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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.
If by joining all of the strings in array2 into one giant string, could it be possible that the end of one string in array2 + the beginning of another string in array2 could inaccurately form a match of a string contained in array1?