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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 helped me pass the kata. The test cases existed but were commented out. Once I added it back in, my solution passed the tests but failed the attempt. I had to use the above recommendation of calling the functions instead of returning the value in order for it to work.
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