1 String Shuffling

"A1B2C3D4E5" - "ABCDE12345"

• merge sort

"ABCDE12345" - "A1B2C3D4E5"

1. |AB|CD|12|34|
2. |AB|12|CD|34|
3. |A1B2|C3D4|

2 String Permutation

3 Encode and Decode

4 Sliding Window in a String