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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.
I don't understand where is my mistake. I passed example_tests, but failed
more_tests
Expected: equal to 13
Actual: 14
random_tests
Expected: equal to 87
Actual: 92