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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.
Please, next time you post code, mark your post as having spoiler content. About your code, your last line should work but I don't know where you wrote it (read the next sentence). Then you typed the input and another error appears because of that.
This comment is hidden because it contains spoiler information about the solution