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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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Only adjacent directions should be reduced. It's like considering curvature of the Earth. Or maybe going down a spiral staircase where you end up in a different layer.