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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.
Actual and expected are swapped in PHP
C# issue: currently function expects (int[,] input), while actually it should be (string[][] input). For 7kyus this might cause issues.
Ruby 3.0 should be enabled, see this to learn how to do it
Ruby 3.0 should be enabled.