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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.
You don't even need regex to be honest, I did it by mapping on the given array and checking on each entry if a predefined array of eyes for example includes the first position of the string.
dont make me feel more stupid then I already felt, until 5 min ago I din't know about regex.