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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.
Since this is a kata that demands some math knowledge (permutations and combinatory), I would suggest that the "Math" tag would be added to it.
Thanks! This is my first authored kata. Sorry! =)
Mine is failing in test 1009 (I suppose), but it seems that it's just like the first one. Could the author please check it out?