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Last Seen:Sep 2017
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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.
There is a trick in description - all the ranges have upper border exclusive, besides the A range. That really confused me - I noticed that when seeing Test cases after gave up, not able to satisy them ;-)