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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.
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Perhaps add some more test cases so that more than one case is checked.
We have one for 10, perhaps one for 100 or even 500. The code should be able to handle all.