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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.
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I think the alphabet should be specified in the problem statement or the code, solving the problem is much more about figuring out the shifting rules than the actual logic of the problem.
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