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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.
Fun kata, but you should make it easier to know which pieces of code are Preloaded by copy/pasting them into the Description.
C# version has random string length tests, eventhough the description says otherwise.
"Both strings will be of length 18, and each character in the string will be a number between 1 and 9 inclusive."