Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Sorry!
My foolish mistake - forgot 'return' in result string in code.
Read this: https://docs.codewars.com/training/troubleshooting
On Google Colab my code works correct (also with strings from the test), but here i've catch error message (for 'test' => None not 'es')...
Were is I wrong?
Code:
*** Hide. ready to show