the code works fine but the test cases, can anyone help me out https://www.sololearn.com/coach/51?ref=app

Question

https://code.sololearn.com/c6nyBpdWA9go/?ref=app

Answer 1

[Duplicate]

Justus did you know that you don't need to convert your string to list and then join it back again.
In many situations strings behave like list.

Answer 2

Kevin star i didn't know that. Thanks. Updated