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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.
Although you're using one fewer line, you're allocating the greeting string twice.
It isn't clear from the instructions that the rotations HAVE to be in the forward direction. If you rotate in the opposite direction, you can match in fewer rotations.