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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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Please read the description again and some posts below. There are no errors in the tests. 6 is not a gap between 101 and 107 since there is 103 in between.