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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.
My solution uses only 16 digits but still passes all tests.
I unpublished the challenge because as it is now, it is based on a premise flawed on a very fundamental level.