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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.
Think how you give change, that's your problem, the test is ok.
This comment is hidden because it contains spoiler information about the solution
or the test is correct and you didn't understand the task correctly....