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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.
in roman to int function my function return less charters then the orginal one so does that make pass the test or i should make it literly the same as original one :)