feat(curriculum): daily challenges 264-278 (#67117)

Co-authored-by: majestic-owl448 <26656284+majestic-owl448@users.noreply.github.com>

curriculum/structure/blocks/daily-coding-challenges-python.json

@@ -1056,6 +1056,66 @@
     {
       "id": "69c6ff713a52713463aa7929",
       "title": "Challenge 263: Binary Crossword"
+    },
+    {
+      "id": "69cfca90e8a0a6d4d6871c4e",
+      "title": "Challenge 264: Anagram Groups"
+    },
+    {
+      "id": "69cfca90e8a0a6d4d6871c4f",
+      "title": "Challenge 265: Deepest Brackets"
+    },
+    {
+      "id": "69cfca90e8a0a6d4d6871c50",
+      "title": "Challenge 266: Good Day"
+    },
+    {
+      "id": "69cfca90e8a0a6d4d6871c51",
+      "title": "Challenge 267: Parsec Converter"
+    },
+    {
+      "id": "69cfca90e8a0a6d4d6871c52",
+      "title": "Challenge 268: Narcissistic Number"
+    },
+    {
+      "id": "69cfca90e8a0a6d4d6871c53",
+      "title": "Challenge 269: Allergen Friendly Meals"
+    },
+    {
+      "id": "69cfca90e8a0a6d4d6871c54",
+      "title": "Challenge 270: Longest Common Substring"
+    },
+    {
+      "id": "69d03e549613fbdbe21d11e0",
+      "title": "Challenge 271: Medication Reminder"
+    },
+    {
+      "id": "69e2383af7832c8032603b8e",
+      "title": "Challenge 272: Transposed Matrix"
+    },
+    {
+      "id": "69e2383af7832c8032603b8f",
+      "title": "Challenge 273: ISBN-13 Validator"
+    },
+    {
+      "id": "69e2383af7832c8032603b90",
+      "title": "Challenge 274: Oldest Person"
+    },
+    {
+      "id": "69e2383af7832c8032603b91",
+      "title": "Challenge 275: Character Frequency"
+    },
+    {
+      "id": "69e2383af7832c8032603b92",
+      "title": "Challenge 276: Offending Element"
+    },
+    {
+      "id": "69e2383af7832c8032603b93",
+      "title": "Challenge 277: Mirror Image"
+    },
+    {
+      "id": "69e2383af7832c8032603b94",
+      "title": "Challenge 278: Coffee Order Parser"
     }
   ]
 }