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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.
Not a kata issue, there was a single sample test, the Attempt tests have other numbers in the strings.
The test is this:
And there is nothing to fix. If you see another thing, click reset.