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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.
it's not enough tests. And it would be nice to add
a few examples in description
Very interesting kata!
Why didn't I think of that?
With frequent use concatenation, it would be better to use class StringBuilder.
it's really cool!
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