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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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length of each element in the 2D array must equals length of 2D array itself. Is in the kata description
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snail([[1,2,3,4], [16,17,18,5], [15,24,19,6], [14,23,20,7], [13,22,21,8], [12,11,10,9]])