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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.
The kata description says, "You don't have to worry with strings with less than two characters."
it show an error:
slice out of boundthis solution can be improved!
good catch!
What if word is an empty string?