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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.
Why do you put a caret on the inside brackets as well as the outside?
The address column is to be replaced by the two columns "numbers" and "letters", each of which shall contain the respective characters from the address.
What is meant by "split out numbers from letters"?
Is this asking to get rid of the address collum?