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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.
Bi-directional as in moving the cups left-right && right-left as opposed to one way? Not entirely sure what this means since I'm prety sure my code is correct but running into the same issues as other posters on the 2nd test when submiting.
How is this 6 kyu? Should be 8 kyu. Way too easy.