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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.
this solution is incomplete i post another with a little change and better results
this is my ultimate solution, at first attemp i forgot implement a control of the case when a numbers greater than 6 are informed in groups of three