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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.
Actually the straight forward part was figuring out the rearrange. I've gotten so many bugs from the actually swapping of numbers that I want to quit and it's all because I am working with a long which has many less methods than a standard int.
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This comment is hidden because it contains spoiler information about the solution