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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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Probably misread or something
I don't see the issue here. Did you read should instead of could? Or should it state "A note could be used more than once" to avoid confusion?
why did the set still accepts the duplicate letters? i thought sets removes duplicates
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You need more than one set of tests.
Also this is mostly a duplicate of https://www.codewars.com/kata/mastermind
(Not raising as an issue because they're sufficiently different. The idea is still the same, however.)
tourist.improvise # returns a 5-note array like ['B','C','C','F','A']This comment is hidden because it contains spoiler information about the solution
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I've updated the description. Was this too difficult for a kata? Should I reduce the number of attempts required to pass? Should I give better hints so that the various algorithms for this puzzle can be found online easier?