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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.
This kata has confusing instructions... the prompt asks you to write a function, but most of the solutions aren't using functions (or the CREATE function keyword), and the tests don't check if you wrote a function either.