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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.
Your function should return, not print the result.
it is returning none, but if i add a print statement it is primting thr proper value. i can pass 2 of the cases though