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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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Now that you solved it, look at the random tests and see how the function is called in
testSelfieRotRandom. There is no bypass of oper.I just tried a few solutions and saw no problem.