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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.
Thanks for letting us know, but that kind of report is not very useful. Please explain which kind of inputs would fail your solution and give concrete examples. Also state the language you are using.