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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.
Maybe your result has some leading or trailing whitespace?
Did you succeed?
This is not a problem of the kata. Did you try several times? Maybe CW was too busy??
Which language?