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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.
Express the numbers in a shorter way, e.g. instead of "1,2,3,4,5,6,7,8,9" you could just say "1-9"
It's not about changing the numbers or doing any math on them, just looking for streaks of at least three in a row and then "summarizing" those streaks