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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 is most likely due to the fact that, when you try an "attemp", your code gets tested against random tests. So, it is possible that sometimes the same code passes more tests than others.
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