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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.
That was actually my first thought when making my answer to this kata. Until halfway through I realized that I wasn't accounting for duplicates which happened to add up to 45 in the end.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution