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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.
Thanks a lot, that helped
The only doubled letter is
t
there, doubled is 2 of the same letters next to each other, not appearing twice in the word.The word lettuce has a double e and a double t.
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