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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.
I think this kata is for 5th kyu, not 6th. A lot of work.
I have the same issue. But how to optimize the code? I've tryied, but can not pass the test.