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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.
Those two intervals overlap, and form a single interval:
[61, 453]with a length of 392.Please read the posts already here, it's been asked and answered many times.
And more
The last two columns are wrong, False is the right answer. Not a kata issue.