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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.
OP solved it, closing. But next time do not modify the input, it is bad practice.
maybe im bad, but all the answers (yours and mine) are same,and every of it marks as: 'None should equal [list]', in log everything is clear