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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.
I should've used
str.charAt(0)instead ofstr.substring(0, 1)as it would be easier to read...This one doesn't accept strings like "(x)". So I've submitted another one that does it.
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