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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.
I have same problem, the code works fine in my Python IDE but this test makes it impossible to get through. The test answer deletes some of the evens!