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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.
The naked_twins strategy is redundant for this kata. Comment it out and the solution still works. I guess you just needed the world to know about this strategy ;)
naked_twins
lolbravo
Brilliant solution :)