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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.
This doesn't deserves to be 5 kata question.
This comment is hidden because it contains spoiler information about the solution
There is no failed case showing, still the code is showing error, how is that possible?