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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.
Needs test cases
The description states:
If the given input is not an integer, return "Error 404".
However the tests fail as they are looking for a different error message of "Invalid Value".