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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.
Just once. I think something glitched out and allowed me to submit an unverified solution. If I remember it correctly, it didn't actually even show the test results, just the results of the sample tests.
Somehow the server accepted this.