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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 am fairly certain this counts as duplicate of following kata (although it's missing random tests in JS), there are some minor differences but the core task is the same.
I may have overlooked, but I don't think there are equal version numbers in the tests. I would add test cases with duplicates.
No random tests.