| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 41 | Caesar Cipher | Easy | StringsStringASCII |
| 42 | Acronym Generator | Easy | StringsStringSplit |
| 43 | Email Validator | Easy | StringsStringLogic |
| 44 | Sentence Reverser | Easy | StringsStringSplit |
| 45 | Character Frequency Counter | Easy | StringsStringMap/Dict |
| 46 | Pangram Checker | Easy | StringsStringSet |
| 47 | Remove Duplicates from String | Easy | StringsStringSet/Loop |
| 48 | Substring Finder | Easy | StringsStringSearch |
| 49 | ROT13 Encoder/Decoder | Easy | StringsStringASCII |
| 50 | Longest Word Finder | Easy | StringsStringSplit |
| 51 | Array Sum and Average | Easy | ArraysArrayLoop |
| 52 | Linear Search | Easy | ArraysArraySearch |
| 53 | Array Reversal | Easy | ArraysArrayLoop |
| 54 | Array Left Shift by Reversal | Easy | ArraysArrayIn-place |
| 55 | Second Largest Element | Easy | ArraysArrayLogic |
| 56 | Array Wave Arranger | Easy | ArraysArraySorting |
| 57 | Interleave Two Arrays | Easy | ArraysArrayLogic |
| 58 | Count Occurrences | Easy | ArraysArrayLoop |
| 59 | Even-Odd Separator | Easy | ArraysArrayPartition |
| 60 | Prefix Product Array | Easy | ArraysArrayLoop |