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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.
My solution passes all the test cases. However when I try to submit my solution, my solution passes 5 times and fails for the 6th test (Expected: Wrong, instead got: undefined). How does the 6th test look like - what is the case there?