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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.
Oh damn! SORRY, of course! Thanks!
You are returning the wrong string.
Change:
You're meant to return your output and not print to the console (using print()). Replace print with return. All Katas on the website work like this.
Also you don't have to call the function manually since the testcases will automatically call the function for you.
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