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.
isinstance
looks correct, but what is that ?Read this: https://docs.codewars.com/training/troubleshooting/#.print-vs-return
Logs show that my code gives the right output, yet I get test failed :(