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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.
Sometimes tests did not pass out, then after reexecuting they became passed
Tests do not take into account two-digits numbers like 11, 13.