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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.
Wauw! I completely missed the point of this (RegEx) and bruteforced it on a lazy day in my couch. Now I learned to read the tags. If someone can delete this (as I can't) so I can create a prober solution, that would be excellent.