diff --git a/curriculum/challenges/_meta/learn-string-manipulation-by-building-a-cipher/meta.json b/curriculum/challenges/_meta/learn-string-manipulation-by-building-a-cipher/meta.json
index 6ab86712bae..674059deedb 100644
--- a/curriculum/challenges/_meta/learn-string-manipulation-by-building-a-cipher/meta.json
+++ b/curriculum/challenges/_meta/learn-string-manipulation-by-building-a-cipher/meta.json
@@ -64,332 +64,336 @@
       "title": "Step 13"
     },
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+      "id": "6624e0ec0bf47017eed84b1f",
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-      "id": "659526f3e5424b3eac4b6aa7",
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-      "id": "65520e6f2b9678799977f24d",
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       "title": "Step 18"
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-      "id": "659530ca823d6c47f61daa8a",
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-      "id": "65687d2f8c7ee27b0446cef3",
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-      "id": "656886ec4e4d9b96ded3c565",
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       "title": "Step 34"
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       "title": "Step 35"
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       "title": "Step 37"
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       "title": "Step 38"
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       "title": "Step 41"
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       "title": "Step 42"
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       "title": "Step 47"
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       "title": "Step 48"
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     {
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       "title": "Step 49"
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     {
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+      "id": "6553ed69ece88d29594748aa",
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       "title": "Step 58"
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+      "id": "6554930320d70414e7b6acc6",
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       "title": "Step 60"
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       "title": "Step 61"
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       "title": "Step 62"
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     {
-      "id": "6554a57ec0a2c52106e7ee50",
+      "id": "6554a49a4f782f208abcc87e",
       "title": "Step 63"
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     {
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       "title": "Step 64"
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+      "id": "6554a88d5af937226f4a9121",
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       "title": "Step 78"
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-      "id": "6555201d9b7fc917399f9f0b",
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       "title": "Step 79"
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-      "id": "6555231eac4d9f19bd3d44b5",
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+      "id": "6555e1bfcd374e18c6be8e58",
       "title": "Step 91"
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     {
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       "title": "Step 92"
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     {
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+      "id": "6555e43e783ed31a0532b1b2",
       "title": "Step 93"
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     {
-      "id": "6555e547c18a2b1a7b795bd8",
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       "title": "Step 94"
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     {
-      "id": "6555e5991af57d1ae0e35f0a",
+      "id": "6555e547c18a2b1a7b795bd8",
       "title": "Step 95"
+    },
+    {
+      "id": "6555e5991af57d1ae0e35f0a",
+      "title": "Step 96"
     }
   ],
   "helpCategory": "Python"
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index d77bcd5d985..6bb450c362b 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 7e9ae9dc9ed..687715d27a9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 86a5a8baa9a..219aeee0c85 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index d77bcd5d985..6bb450c362b 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 7e9ae9dc9ed..687715d27a9 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 86a5a8baa9a..219aeee0c85 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index d77bcd5d985..6bb450c362b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 7e9ae9dc9ed..687715d27a9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 86a5a8baa9a..219aeee0c85 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index 5c272b6d6f1..5521a7ef0cb 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -7,17 +7,16 @@ dashedName: step-13
 
 # --description--
 
-The first kind of cipher you are going to build is called a *Caesar* cipher. Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions, and replace the original letter with the new letter.
-
-Start by finding the position of the first letter in the string. One way is to call the `.find()` string method on the string you want to parse:
+You are going to use the `.find()` method to find the position in the alphabet of each letter in your message. A method is similar to a function, but it belongs to an object.
 
 ```py
-text.find('W')
+sentence = 'My brain hurts!'
+sentence.find('r')
 ```
 
-Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
+Above, the `.find()` method is *called on* `sentence` (the string to search in), and `'r'` (the character to locate) is passed as the argument. The `sentence.find('r')` call will return `4`, which is the index of the first occurrence of `'r'` in `sentence`.
 
-At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
+At the end of your code, call `.find()` on `alphabet` and pass `'z'` as the argument to the method.
 
 # --hints--
 
@@ -33,12 +32,14 @@ You should call the `.find()` method on the `alphabet` variable.
 assert.match(code, /alphabet\.find\s*\(.*\)/)
 ```
 
-You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
+
+You should call the `.find()` method on the `alphabet` variable and pass `'z'` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*('|")z\1\s*\)/m)
 ```
 
+
 Your code contains invalid syntax and/or invalid indentation.
 
 ```js
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..d2285f294cc 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -1,8 +1,8 @@
 ---
 id: 655208d59b131e7816f18c96
-title: Step 14
+title: Step 15
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..3a5e125bb42 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -1,8 +1,8 @@
 ---
 id: 655209a4a27dd37873c4cac3
-title: Step 16
+title: Step 17
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..c4c346e5bc3 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -1,8 +1,8 @@
 ---
 id: 65520e6f2b9678799977f24d
-title: Step 17
+title: Step 18
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..c84dce1fe16 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -1,8 +1,8 @@
 ---
 id: 65520f8282faf57a0db4f7fe
-title: Step 20
+title: Step 21
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..709e5afe891 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -1,8 +1,8 @@
 ---
 id: 65521203d7165c7b84b22ad4
-title: Step 22
+title: Step 23
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..8839b4b82f9 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -1,8 +1,8 @@
 ---
 id: 65521fc818947e800bffe48a
-title: Step 27
+title: Step 28
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e8f7b0f5ffa 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -1,8 +1,8 @@
 ---
 id: 655220953ba90d80514d7ee2
-title: Step 28
+title: Step 29
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..91cc8a963ea 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -1,8 +1,8 @@
 ---
 id: 65522255d5b9cd80f335c6f2
-title: Step 30
+title: Step 31
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..ace18a338cd 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -1,8 +1,8 @@
 ---
 id: 6552487e689f6e895f658717
-title: Step 34
+title: Step 35
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..fc923f23951 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -1,8 +1,8 @@
 ---
 id: 65524b3aa6a1938a069a91ab
-title: Step 35
+title: Step 36
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..d995a4f150b 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -1,8 +1,8 @@
 ---
 id: 65524b790ba8558a2f1c9fe5
-title: Step 36
+title: Step 37
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..3ab68d59ceb 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -1,8 +1,8 @@
 ---
 id: 65524d2a1a253b8bb5197ae2
-title: Step 29
+title: Step 30
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..9eb999ef789 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -1,8 +1,8 @@
 ---
 id: 655251308f31958d06cdf267
-title: Step 37
+title: Step 38
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..64f06c84ea2 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -1,8 +1,8 @@
 ---
 id: 65525e359ca28d938baa82c5
-title: Step 40
+title: Step 41
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..5903c024c89 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -1,8 +1,8 @@
 ---
 id: 655261b2e1f2c197093f3993
-title: Step 42
+title: Step 43
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..916f3a05aac 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -1,8 +1,8 @@
 ---
 id: 6553980e0527fa115c705646
-title: Step 43
+title: Step 44
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..b9f0bc15fe8 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -1,8 +1,8 @@
 ---
 id: 6553995f412dd8122ed38e4a
-title: Step 44
+title: Step 45
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..91d74da673a 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -1,8 +1,8 @@
 ---
 id: 6553a44b1801991847d8cc69
-title: Step 48
+title: Step 49
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..35648bbbacc 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -1,8 +1,8 @@
 ---
 id: 6553a572f7a65718f1e42e18
-title: Step 50
+title: Step 51
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..ef860412a27 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -1,8 +1,8 @@
 ---
 id: 6553a755879b131a445e664c
-title: Step 45
+title: Step 46
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..c036fd747cf 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -1,8 +1,8 @@
 ---
 id: 6553a7d8d05cbb1ae335a665
-title: Step 46
+title: Step 47
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..e9870c4826a 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -1,8 +1,8 @@
 ---
 id: 6553ed69ece88d29594748aa
-title: Step 51
+title: Step 52
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..e5fddd61357 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -1,8 +1,8 @@
 ---
 id: 6553efd6ada3f42aa2d75448
-title: Step 52
+title: Step 53
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..bdc61a56deb 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -1,8 +1,8 @@
 ---
 id: 6553f3fc92741c2bf8ded140
-title: Step 53
+title: Step 54
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..7231a51b126 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -1,8 +1,8 @@
 ---
 id: 6553f4f66099802c6ae94613
-title: Step 54
+title: Step 55
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..92734e07289 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -1,8 +1,8 @@
 ---
 id: 6553f6086add4b2cbb99fd78
-title: Step 55
+title: Step 56
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..618fa7e21bb 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -1,8 +1,8 @@
 ---
 id: 6553f6b4ec51112d44d737c8
-title: Step 49
+title: Step 50
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..1355edcf141 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -1,8 +1,8 @@
 ---
 id: 6553f8c570f9982e013a8886
-title: Step 56
+title: Step 57
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..5b984de7d3b 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -1,8 +1,8 @@
 ---
 id: 655491bd5b98b813fa5bedca
-title: Step 57
+title: Step 58
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..b6a7f0aa9c6 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -1,8 +1,8 @@
 ---
 id: 6554930320d70414e7b6acc6
-title: Step 58
+title: Step 59
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..5efbe910d0e 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -1,8 +1,8 @@
 ---
 id: 65549561463f0016876e852c
-title: Step 59
+title: Step 60
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..b8abcbb5788 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -1,8 +1,8 @@
 ---
 id: 65549f90cf78131c96ebcf28
-title: Step 60
+title: Step 61
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..01181c37df7 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -1,8 +1,8 @@
 ---
 id: 6554a334a40edb1fb4eff827
-title: Step 61
+title: Step 62
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..b58810881c4 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -1,8 +1,8 @@
 ---
 id: 6554a49a4f782f208abcc87e
-title: Step 62
+title: Step 63
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..0bd011f3056 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -1,8 +1,8 @@
 ---
 id: 6554a57ec0a2c52106e7ee50
-title: Step 63
+title: Step 64
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index e210714da7c..ad2d60bc565 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -1,8 +1,8 @@
 ---
 id: 6554a88d5af937226f4a9121
-title: Step 64
+title: Step 65
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..7457687ccd9 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -1,8 +1,8 @@
 ---
 id: 6554ac937a49be2701af4f2f
-title: Step 65
+title: Step 66
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index 883c36a3b4e..38d7810807e 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -1,8 +1,8 @@
 ---
 id: 6554ad2463b8892748f8efdd
-title: Step 66
+title: Step 67
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..2405723afae 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -1,8 +1,8 @@
 ---
 id: 6554d0332949b133a0b35eaa
-title: Step 67
+title: Step 68
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..c4181e5c5d0 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -1,8 +1,8 @@
 ---
 id: 6554d15c8acb5f34499ad789
-title: Step 68
+title: Step 69
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index ebe0247bb55..226dca98be8 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -1,8 +1,8 @@
 ---
 id: 6554d25dc5ceaa354307a77e
-title: Step 69
+title: Step 70
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..f8a74620872 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -1,8 +1,8 @@
 ---
 id: 6554de295ade563a069936a1
-title: Step 70
+title: Step 71
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..2a57a505732 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -1,8 +1,8 @@
 ---
 id: 6554dfce1683be3c0c9609a6
-title: Step 71
+title: Step 72
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..72b7af3dadc 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -1,8 +1,8 @@
 ---
 id: 6554e0adc7bb193cbfdb36d5
-title: Step 72
+title: Step 73
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..4ac59ba2ee4 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -1,8 +1,8 @@
 ---
 id: 6554e2ee23bfd93f2c83640f
-title: Step 73
+title: Step 74
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..f4745b80538 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -1,8 +1,8 @@
 ---
 id: 6554e343caea913ffba7bec6
-title: Step 74
+title: Step 75
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..14d6aad3a62 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -1,8 +1,8 @@
 ---
 id: 655516e410b8e30fb4fb64e8
-title: Step 75
+title: Step 76
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index e2ec9d01611..9298423269b 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -1,8 +1,8 @@
 ---
 id: 65551a628bcb7e121e32d04b
-title: Step 78
+title: Step 79
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..b51599724ea 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -1,8 +1,8 @@
 ---
 id: 6555201d9b7fc917399f9f0b
-title: Step 79
+title: Step 80
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..37ab3631ee0 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -1,8 +1,8 @@
 ---
 id: 655520c20cb1e6177b0641d6
-title: Step 80
+title: Step 81
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..0fc9fdd1938 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -1,8 +1,8 @@
 ---
 id: 655522883e66f618e03a9411
-title: Step 81
+title: Step 82
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..9b177ba757e 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -1,8 +1,8 @@
 ---
 id: 6555231eac4d9f19bd3d44b5
-title: Step 82
+title: Step 83
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..dbe2439e466 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -1,8 +1,8 @@
 ---
 id: 65552a111190e11f0963949e
-title: Step 83
+title: Step 84
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..7d581589c83 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -1,8 +1,8 @@
 ---
 id: 65552a9593755e1fb2f5ab50
-title: Step 84
+title: Step 85
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..afc5580a630 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -1,8 +1,8 @@
 ---
 id: 65552b14e803731fe3c1e4ca
-title: Step 85
+title: Step 86
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cee38557012..920a8be3ade 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -1,8 +1,8 @@
 ---
 id: 65553159615a8123b190ee43
-title: Step 86
+title: Step 87
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..c8c4b082338 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -1,8 +1,8 @@
 ---
 id: 6555d6e12c95701172b55709
-title: Step 76
+title: Step 77
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..38da1a0f062 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -1,8 +1,8 @@
 ---
 id: 6555d8b0b3d20b128bdadd37
-title: Step 77
+title: Step 78
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index fe2c23a64ff..2aa3e99ffe1 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -1,8 +1,8 @@
 ---
 id: 6555db4a7b788e15795674e5
-title: Step 88
+title: Step 89
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 95ea421f7cb..09ea7a24978 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -1,8 +1,8 @@
 ---
 id: 6555df0c81300b175308557d
-title: Step 89
+title: Step 90
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..dc9a8c24fc2 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -1,8 +1,8 @@
 ---
 id: 6555e1bfcd374e18c6be8e58
-title: Step 90
+title: Step 91
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..e372c7bd573 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -1,8 +1,8 @@
 ---
 id: 6555e3f387381a19d5e00333
-title: Step 91
+title: Step 92
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..2cb1b183b8b 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -1,8 +1,8 @@
 ---
 id: 6555e43e783ed31a0532b1b2
-title: Step 92
+title: Step 93
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..7bdde40cd59 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -1,8 +1,8 @@
 ---
 id: 6555e547c18a2b1a7b795bd8
-title: Step 94
+title: Step 95
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 7b8271ab5ca..0a6a778d0e1 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -1,8 +1,8 @@
 ---
 id: 6555e5991af57d1ae0e35f0a
-title: Step 95
+title: Step 96
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..357d56bce82 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -1,8 +1,8 @@
 ---
 id: 655619327c7b364166f8dd6f
-title: Step 47
+title: Step 48
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 678a1763b2b..d9e7527487e 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -1,8 +1,8 @@
 ---
 id: 655a2a7210094920069b117c
-title: Step 41
+title: Step 42
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..877ea88c7f1 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -1,8 +1,8 @@
 ---
 id: 65687d2f8c7ee27b0446cef3
-title: Step 23
+title: Step 24
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..d4a47183955 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -1,8 +1,8 @@
 ---
 id: 656883980318048fb11a6e3b
-title: Step 24
+title: Step 25
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..7fe0ade4827 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -1,8 +1,8 @@
 ---
 id: 656884439d4d7d929d58669d
-title: Step 25
+title: Step 26
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..5d33420d841 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -1,8 +1,8 @@
 ---
 id: 656886ec4e4d9b96ded3c565
-title: Step 26
+title: Step 27
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..fc8fbf29480 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -1,8 +1,8 @@
 ---
 id: 65688a50e6c998a21d8e41d3
-title: Step 31
+title: Step 32
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..7619665204a 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -1,8 +1,8 @@
 ---
 id: 65688b5a1655a7a6caede847
-title: Step 32
+title: Step 33
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..383c86928d8 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -1,8 +1,8 @@
 ---
 id: 6568b7a40c7ba0ccbc4b4425
-title: Step 33
+title: Step 34
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..728cca26c90 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -1,8 +1,8 @@
 ---
 id: 6568c86dc9193000d11ca5e0
-title: Step 39
+title: Step 40
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..18f9b54b83a 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -1,8 +1,8 @@
 ---
 id: 6568cc9301a0c41058ed95c5
-title: Step 38
+title: Step 39
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..fceca72c9b3 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -1,8 +1,8 @@
 ---
 id: 659526f3e5424b3eac4b6aa7
-title: Step 15
+title: Step 16
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..70e8dcca396 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -1,8 +1,8 @@
 ---
 id: 65952b70924edb449faf1950
-title: Step 18
+title: Step 19
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..fffb54a7d67 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -1,8 +1,8 @@
 ---
 id: 659530ca823d6c47f61daa8a
-title: Step 19
+title: Step 20
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..d3d731ffda0 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -1,8 +1,8 @@
 ---
 id: 659db3e3670d3e712be82593
-title: Step 21
+title: Step 22
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..6b039444ed9 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -1,8 +1,8 @@
 ---
 id: 65a450e8fb2c9d75c7378d28
-title: Step 87
+title: Step 88
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..f66b75cbf83 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -1,8 +1,8 @@
 ---
 id: 65a51c9e000b660122b8b29e
-title: Step 93
+title: Step 94
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 6941c8d1662..ecc77ef618e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 3063be1ca49..14b0a27b2ef 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 8dc4f897873..0a713d8a040 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index d77bcd5d985..6bb450c362b 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 7e9ae9dc9ed..687715d27a9 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 745930f7cc7..ab8206cb3cd 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index d77bcd5d985..6bb450c362b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 7e9ae9dc9ed..687715d27a9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 86a5a8baa9a..219aeee0c85 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index d77bcd5d985..6bb450c362b 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 7e9ae9dc9ed..687715d27a9 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 86a5a8baa9a..219aeee0c85 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index d77bcd5d985..6bb450c362b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 7e9ae9dc9ed..687715d27a9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 86a5a8baa9a..219aeee0c85 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index d77bcd5d985..6bb450c362b 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 7e9ae9dc9ed..687715d27a9 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 86a5a8baa9a..219aeee0c85 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 3e3af82109c..496dc995e55 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Step 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 83feddb9318..361b8a6492d 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Step 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index ded276202b3..7dca8fe8cea 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Step 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index e4c0036ebff..91e5070225c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Step 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index a8da79ffd22..112196ec2af 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Step 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 885eb49d34d..5cc71dbedeb 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Step 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 187cfeb63bd..e3c10ad65b0 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Step 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index e73940ed91a..249f47262d7 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Step 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index 65d94f64a98..fd05b06aa74 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Step 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index 88625fd0b3a..5440bf43260 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Step 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index a683c48417a..30de1df4b5e 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Step 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 31ebc0b923d..8a1160d6126 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Step 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index cd6e9c3d143..8a7c6c7d618 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Step 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index b47b6cbd10a..8e7fbc1b6a6 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Step 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 0bec1392e45..a200f79112b 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Step 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index f3fc108e506..bcf09bb92a7 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Step 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 09f36f44191..1d06984e53d 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Step 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index 23187e2c0e9..82d64e477e5 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Step 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 0a1bf0aee02..b416444157f 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Step 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index f6ea23b4325..248734c2367 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Step 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index 7eb406a4482..fbbd30e7fa8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Step 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 389e50022dc..b0017d6d661 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Step 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index b87fc6b73a3..852560f6f3a 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Step 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 65778ba71a2..b06afbd647b 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Step 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index f9b85c8f34e..eb4c83a9a12 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Step 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 10f6d47d0de..437eae50a56 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Step 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 0b2eb81f4f6..a036fad697d 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Step 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index d4bedabdd8a..cc09702cbb1 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Step 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index a6e04010a63..4be8ee2b959 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Step 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b5f4088d3b7..c4c1acf579c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Step 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 47211f5e8bc..93fdb37295a 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Step 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 7e452e05438..63b51a25bec 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Step 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index 50eee735bc3..9e45e95a8cf 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Step 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7ca155b0c73..7f7106683ff 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Step 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index a6cd4a9a348..8d85a57c8e8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Step 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 15a6b4a1651..ec7b8876e19 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Step 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index f783cbf3472..481ca38fa64 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Step 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index b4bedd5f5e8..097a56ef391 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Step 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index acf5b0f71c8..0bdb606ae75 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Step 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index 87f8a5aa7f3..5b6c9873f57 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Step 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 01efb7bb570..df5ce652cd3 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Step 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index d29b009f3cf..e1ef0a27733 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Step 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 9f1ea94390c..c083505a1b9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Step 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index adf869e6b5f..6cf33c33ca0 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Step 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 8e744b4c09f..4b8b3dfa570 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Step 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index cd7e9ce3a58..a6da36ecfde 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Step 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6ecf2194d0..1b2e4796bc6 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Step 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index d77bcd5d985..6bb450c362b 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Step 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index a60afdc14cc..83c3825ec7f 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Step 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 40bfdb53982..08eddee7f3f 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Step 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index 822b22f2743..a91c632d6fb 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Step 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index 82df5c7e409..c95af591bb1 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Step 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index ceda0450cc8..124fedea527 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Step 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index c0d946a1d38..41674bfd453 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Step 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index e86470c6c34..279c0f8818a 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Step 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cb2c9d5e191..4d6872144e2 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Step 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index a2e43552133..023e118f3fe 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Step 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 3cfffa05b63..d86246097a6 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Step 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index b809b6cc227..c28ccc7c9d1 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Step 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index bb3bf128cf9..1a6769d5de5 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Step 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 6d5c9a3c856..7109e8566d9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Step 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 4e28d4737fc..9d033b67402 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Step 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index d55577ba1cf..5313366dd3a 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Step 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 073dfdcd2bb..6a42c73d76b 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Step 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 006a04850ea..edb60a28a15 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Step 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index 249be707173..ad7519919aa 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Step 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 7e9ae9dc9ed..687715d27a9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Step 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 86a5a8baa9a..219aeee0c85 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Step 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 82f4873ac00..69f2c143ea4 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Step 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 042349ee0a4..fced60437b3 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Step 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index f971dfe2276..80777aacaf9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Step 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 97fee73da43..9284e436ec8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Step 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index e2b04ef618e..f1414444272 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Step 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 6b04513e34d..1dd4ffd1ce6 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Step 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index effe1bcab70..ecc5a4f74e4 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Step 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index b56f9a3ec59..dd5e24fc3dd 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Step 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 8bc9dc6052f..8cbc110eeeb 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Step 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 3a1e55b4fa4..248d09d91a8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Step 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index 5d5b278b0c6..53257ff05f3 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Step 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 00adf5d72b4..97d646ecbdc 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Step 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index a98c25c7099..5574910c0aa 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Step 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index d239d653b25..5297910ead2 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Step 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 0eb7a83a126..1cf276c9602 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -2,7 +2,7 @@
 id: 655208d59b131e7816f18c96
 title: Крок 14
 challengeType: 20
-dashedName: step-14
+dashedName: step-15
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 3bb250dd593..2321f3e20d3 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -2,7 +2,7 @@
 id: 655209a4a27dd37873c4cac3
 title: Крок 16
 challengeType: 20
-dashedName: step-16
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index af6740c3d86..61d9f38bf3a 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -2,7 +2,7 @@
 id: 65520e6f2b9678799977f24d
 title: Крок 17
 challengeType: 20
-dashedName: step-17
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index abf3a477a35..7e6ad9797ea 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -2,7 +2,7 @@
 id: 65520f8282faf57a0db4f7fe
 title: Крок 20
 challengeType: 20
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index e8b0e53e277..907306f2006 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -2,7 +2,7 @@
 id: 65521203d7165c7b84b22ad4
 title: Крок 22
 challengeType: 20
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
index 39f776137b8..380280668b2 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521fc818947e800bffe48a.md
@@ -2,7 +2,7 @@
 id: 65521fc818947e800bffe48a
 title: Крок 27
 challengeType: 20
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
index 62ac3c54d2a..0c1376194a9 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655220953ba90d80514d7ee2.md
@@ -2,7 +2,7 @@
 id: 655220953ba90d80514d7ee2
 title: Крок 28
 challengeType: 20
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
index d4d8264568a..aeb454360ef 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65522255d5b9cd80f335c6f2.md
@@ -2,7 +2,7 @@
 id: 65522255d5b9cd80f335c6f2
 title: Крок 30
 challengeType: 20
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
index bb9bf2c1949..fac30eb262e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552487e689f6e895f658717.md
@@ -2,7 +2,7 @@
 id: 6552487e689f6e895f658717
 title: Крок 34
 challengeType: 20
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
index ee4699e7501..13e0a51dff4 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b3aa6a1938a069a91ab.md
@@ -2,7 +2,7 @@
 id: 65524b3aa6a1938a069a91ab
 title: Крок 35
 challengeType: 20
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
index c9a559a13b4..efb0bf885d0 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524b790ba8558a2f1c9fe5.md
@@ -2,7 +2,7 @@
 id: 65524b790ba8558a2f1c9fe5
 title: Крок 36
 challengeType: 20
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
index 19870d173fb..be94680e4ac 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65524d2a1a253b8bb5197ae2.md
@@ -2,7 +2,7 @@
 id: 65524d2a1a253b8bb5197ae2
 title: Крок 29
 challengeType: 20
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
index 3a77b36002e..b8c85cd7714 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655251308f31958d06cdf267.md
@@ -2,7 +2,7 @@
 id: 655251308f31958d06cdf267
 title: Крок 37
 challengeType: 20
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
index 5f9c0cf5fb0..1d6ac3feea7 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65525e359ca28d938baa82c5.md
@@ -2,7 +2,7 @@
 id: 65525e359ca28d938baa82c5
 title: Крок 40
 challengeType: 20
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index 12a0bd368f5..743056a579c 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -2,7 +2,7 @@
 id: 655261b2e1f2c197093f3993
 title: Крок 42
 challengeType: 20
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index a4d28d12b93..9b004a36997 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -2,7 +2,7 @@
 id: 6553980e0527fa115c705646
 title: Крок 43
 challengeType: 20
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
index 73a869abedf..35c68c96898 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553995f412dd8122ed38e4a.md
@@ -2,7 +2,7 @@
 id: 6553995f412dd8122ed38e4a
 title: Крок 44
 challengeType: 20
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
index a6d62088ee5..aff8d332ffa 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a44b1801991847d8cc69.md
@@ -2,7 +2,7 @@
 id: 6553a44b1801991847d8cc69
 title: Крок 48
 challengeType: 20
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
index 9b89420bc48..800838d28a4 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a572f7a65718f1e42e18.md
@@ -2,7 +2,7 @@
 id: 6553a572f7a65718f1e42e18
 title: Крок 50
 challengeType: 20
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index 1784a8128b1..f1fb8f03ca7 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -2,7 +2,7 @@
 id: 6553a755879b131a445e664c
 title: Крок 45
 challengeType: 20
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
index b00835a8b7f..a24d44515b4 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a7d8d05cbb1ae335a665.md
@@ -2,7 +2,7 @@
 id: 6553a7d8d05cbb1ae335a665
 title: Крок 46
 challengeType: 20
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
index 93460786fec..29ffa98bc1f 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553ed69ece88d29594748aa.md
@@ -2,7 +2,7 @@
 id: 6553ed69ece88d29594748aa
 title: Крок 51
 challengeType: 20
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
index ae30bbf1f23..49e281618c0 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553efd6ada3f42aa2d75448.md
@@ -2,7 +2,7 @@
 id: 6553efd6ada3f42aa2d75448
 title: Крок 52
 challengeType: 20
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
index 3dad11644c4..bd7d28944b5 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f3fc92741c2bf8ded140.md
@@ -2,7 +2,7 @@
 id: 6553f3fc92741c2bf8ded140
 title: Крок 53
 challengeType: 20
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
index 72fb7b7f5d9..3d4b1fcad2c 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f4f66099802c6ae94613.md
@@ -2,7 +2,7 @@
 id: 6553f4f66099802c6ae94613
 title: Крок 54
 challengeType: 20
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
index 196c386ea69..f749fca7a50 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6086add4b2cbb99fd78.md
@@ -2,7 +2,7 @@
 id: 6553f6086add4b2cbb99fd78
 title: Крок 55
 challengeType: 20
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
index 53723c72d51..e36e045e46b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f6b4ec51112d44d737c8.md
@@ -2,7 +2,7 @@
 id: 6553f6b4ec51112d44d737c8
 title: Крок 49
 challengeType: 20
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
index 228ac4b0559..f5693f162a7 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553f8c570f9982e013a8886.md
@@ -2,7 +2,7 @@
 id: 6553f8c570f9982e013a8886
 title: Крок 56
 challengeType: 20
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
index 1e7496f7329..7ced6e31308 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655491bd5b98b813fa5bedca.md
@@ -2,7 +2,7 @@
 id: 655491bd5b98b813fa5bedca
 title: Крок 57
 challengeType: 20
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index b8840ddb584..583beed2b2c 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -2,7 +2,7 @@
 id: 6554930320d70414e7b6acc6
 title: Крок 58
 challengeType: 20
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index d456d1b1882..578f7a0a831 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -2,7 +2,7 @@
 id: 65549561463f0016876e852c
 title: Крок 59
 challengeType: 20
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 058f601d981..cd034133607 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -2,7 +2,7 @@
 id: 65549f90cf78131c96ebcf28
 title: Крок 60
 challengeType: 20
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
index cda86c3b723..1a9edc6a51b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a334a40edb1fb4eff827.md
@@ -2,7 +2,7 @@
 id: 6554a334a40edb1fb4eff827
 title: Крок 61
 challengeType: 20
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index d3da63a5ec8..b14ecd5dadd 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -2,7 +2,7 @@
 id: 6554a49a4f782f208abcc87e
 title: Крок 62
 challengeType: 20
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 35be35be001..d9852d58a8e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -2,7 +2,7 @@
 id: 6554a57ec0a2c52106e7ee50
 title: Крок 63
 challengeType: 20
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index 9d3ad35caa7..52ff3413a53 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -2,7 +2,7 @@
 id: 6554a88d5af937226f4a9121
 title: Крок 64
 challengeType: 20
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 4a9de2fc8c3..fb50062be88 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -2,7 +2,7 @@
 id: 6554ac937a49be2701af4f2f
 title: Крок 65
 challengeType: 20
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index 537d63f0d06..95d3f0ee900 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -2,7 +2,7 @@
 id: 6554ad2463b8892748f8efdd
 title: Крок 66
 challengeType: 20
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index a24ed5091ca..ebd4b4cb2ab 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -2,7 +2,7 @@
 id: 6554d0332949b133a0b35eaa
 title: Крок 67
 challengeType: 20
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index e0dda0ee210..841951651b6 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -2,7 +2,7 @@
 id: 6554d15c8acb5f34499ad789
 title: Крок 68
 challengeType: 20
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index da2fd9fcad5..22a45ee37db 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -2,7 +2,7 @@
 id: 6554d25dc5ceaa354307a77e
 title: Крок 69
 challengeType: 20
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 73ab25d240a..b7c3cfe8489 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -2,7 +2,7 @@
 id: 6554de295ade563a069936a1
 title: Крок 70
 challengeType: 20
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 631a3c0bdad..203216d9b4b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -2,7 +2,7 @@
 id: 6554dfce1683be3c0c9609a6
 title: Крок 71
 challengeType: 20
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index 0771087a1c4..3e73dbc0f78 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -2,7 +2,7 @@
 id: 6554e0adc7bb193cbfdb36d5
 title: Крок 72
 challengeType: 20
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index 535723174ef..23fa9ff0240 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -2,7 +2,7 @@
 id: 6554e2ee23bfd93f2c83640f
 title: Крок 73
 challengeType: 20
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index c0b04f2d012..6cfc024722f 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -2,7 +2,7 @@
 id: 6554e343caea913ffba7bec6
 title: Крок 74
 challengeType: 20
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index a6c4749a347..0ae87bc4950 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -2,7 +2,7 @@
 id: 655516e410b8e30fb4fb64e8
 title: Крок 75
 challengeType: 20
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index ff13bdacd08..c644c950741 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -2,7 +2,7 @@
 id: 65551a628bcb7e121e32d04b
 title: Крок 78
 challengeType: 20
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index be31021da88..701cfd64577 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -2,7 +2,7 @@
 id: 6555201d9b7fc917399f9f0b
 title: Крок 79
 challengeType: 20
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index 8c67cc94067..8fad07f1e1f 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -2,7 +2,7 @@
 id: 655520c20cb1e6177b0641d6
 title: Крок 80
 challengeType: 20
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index d6a687a0009..c176b8cbaa3 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -2,7 +2,7 @@
 id: 655522883e66f618e03a9411
 title: Крок 81
 challengeType: 20
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index b1bd1c135eb..30df6cfcdab 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -2,7 +2,7 @@
 id: 6555231eac4d9f19bd3d44b5
 title: Крок 82
 challengeType: 20
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index b629ef5b0fe..843fe6ecb38 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -2,7 +2,7 @@
 id: 65552a111190e11f0963949e
 title: Крок 83
 challengeType: 20
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index caefcf8ec9a..53fe278846a 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -2,7 +2,7 @@
 id: 65552a9593755e1fb2f5ab50
 title: Крок 84
 challengeType: 20
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index f069ac9c83a..aaa4f94b54d 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -2,7 +2,7 @@
 id: 65552b14e803731fe3c1e4ca
 title: Крок 85
 challengeType: 20
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e31235754c9..9e3db8411ec 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -2,7 +2,7 @@
 id: 65553159615a8123b190ee43
 title: Крок 86
 challengeType: 20
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 0ef213ab161..9111222b728 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -2,7 +2,7 @@
 id: 6555d6e12c95701172b55709
 title: Крок 76
 challengeType: 20
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 952e7d62541..fab7a307913 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -2,7 +2,7 @@
 id: 6555d8b0b3d20b128bdadd37
 title: Крок 77
 challengeType: 20
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index f3d9f8180f4..845cccf0ed8 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -2,7 +2,7 @@
 id: 6555db4a7b788e15795674e5
 title: Крок 88
 challengeType: 20
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 2b7703707ce..9f86a6a6076 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -2,7 +2,7 @@
 id: 6555df0c81300b175308557d
 title: Крок 89
 challengeType: 20
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index 3be0b8f0229..6d679753ce6 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -2,7 +2,7 @@
 id: 6555e1bfcd374e18c6be8e58
 title: Крок 90
 challengeType: 20
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index 37d3b8573b5..81c63f27195 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -2,7 +2,7 @@
 id: 6555e3f387381a19d5e00333
 title: Крок 91
 challengeType: 20
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index f4a3a3f6495..a48a870b6df 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -2,7 +2,7 @@
 id: 6555e43e783ed31a0532b1b2
 title: Крок 92
 challengeType: 20
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 2e32166ce73..5df2fc12464 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -2,7 +2,7 @@
 id: 6555e547c18a2b1a7b795bd8
 title: Крок 94
 challengeType: 20
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 1254409f50a..5ce0750697e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -2,7 +2,7 @@
 id: 6555e5991af57d1ae0e35f0a
 title: Крок 95
 challengeType: 20
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
index f1fce6a0837..1e4df3b2ca0 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655619327c7b364166f8dd6f.md
@@ -2,7 +2,7 @@
 id: 655619327c7b364166f8dd6f
 title: Крок 47
 challengeType: 20
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 4b6b7e64f04..98d1cdc86b6 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -2,7 +2,7 @@
 id: 655a2a7210094920069b117c
 title: Крок 41
 challengeType: 20
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index b1a6957f29d..eb64c1bc8d0 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -2,7 +2,7 @@
 id: 65687d2f8c7ee27b0446cef3
 title: Крок 23
 challengeType: 20
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
index 2d85bc557e8..8aec7b10123 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656883980318048fb11a6e3b.md
@@ -2,7 +2,7 @@
 id: 656883980318048fb11a6e3b
 title: Крок 24
 challengeType: 20
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index 897a6f2dc9c..801ecb00b93 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -2,7 +2,7 @@
 id: 656884439d4d7d929d58669d
 title: Крок 25
 challengeType: 20
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 3abedbfa22c..425ddf566e3 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -2,7 +2,7 @@
 id: 656886ec4e4d9b96ded3c565
 title: Крок 26
 challengeType: 20
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index 11458a2b93d..33d3e7104f8 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -2,7 +2,7 @@
 id: 65688a50e6c998a21d8e41d3
 title: Крок 31
 challengeType: 20
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 1954a724e19..a3472a0da06 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -2,7 +2,7 @@
 id: 65688b5a1655a7a6caede847
 title: Крок 32
 challengeType: 20
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index ea1e991a263..4d3dbcc8c94 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -2,7 +2,7 @@
 id: 6568b7a40c7ba0ccbc4b4425
 title: Крок 33
 challengeType: 20
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
index 4e84fc07373..0b01482974e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568c86dc9193000d11ca5e0.md
@@ -2,7 +2,7 @@
 id: 6568c86dc9193000d11ca5e0
 title: Крок 39
 challengeType: 20
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
index 0fe6d72e090..387fc0e9468 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568cc9301a0c41058ed95c5.md
@@ -2,7 +2,7 @@
 id: 6568cc9301a0c41058ed95c5
 title: Крок 38
 challengeType: 20
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
index 25a719f407e..84e2f68ecdf 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659526f3e5424b3eac4b6aa7.md
@@ -2,7 +2,7 @@
 id: 659526f3e5424b3eac4b6aa7
 title: Крок 15
 challengeType: 20
-dashedName: step-15
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
index 2a219e3fbc0..04f8ceba6d0 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65952b70924edb449faf1950.md
@@ -2,7 +2,7 @@
 id: 65952b70924edb449faf1950
 title: Крок 18
 challengeType: 20
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
index bb3701a7637..98c90df9a1d 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659530ca823d6c47f61daa8a.md
@@ -2,7 +2,7 @@
 id: 659530ca823d6c47f61daa8a
 title: Крок 19
 challengeType: 20
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
index 5f0367d889c..af274d7adb0 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/659db3e3670d3e712be82593.md
@@ -2,7 +2,7 @@
 id: 659db3e3670d3e712be82593
 title: Крок 21
 challengeType: 20
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index ea3625ac2c0..01cb447be0f 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -2,7 +2,7 @@
 id: 65a450e8fb2c9d75c7378d28
 title: Крок 87
 challengeType: 20
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 66baf944dc7..85ab33aa2de 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -2,7 +2,7 @@
 id: 65a51c9e000b660122b8b29e
 title: Крок 93
 challengeType: 20
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
new file mode 100644
index 00000000000..6cc15944f29
--- /dev/null
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6624e0ec0bf47017eed84b1f.md
@@ -0,0 +1,33 @@
+---
+id: 6624e0ec0bf47017eed84b1f
+title: Step 14
+challengeType: 20
+dashedName: step-14
+---
+
+# --description--
+
+The first kind of cipher you are going to build is called a *Caesar* cipher.  Specifically, you will take each letter in your message, find its position in the alphabet, take the letter located after 3 positions in the alphabet, and replace the original letter with the new letter.
+
+To implement this, you will use the `.find()` method discussed in the previous step. Modify your existing `.find()` call passing it `text[0]` as the argument instead of `'z'`.
+
+# --hints--
+
+You should modify your existing `alphabet.find('z')` call passing `text[0]` to the method.
+
+```js
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*0\s*\]\s*\)/m)
+``` 
+
+# --seed--
+
+## --seed-contents--
+
+```py
+--fcc-editable-region--
+text = 'Hello World'
+shift = 3
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+alphabet.find('z')
+--fcc-editable-region--
+```