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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.
How am I supposed to know I'm supposed to concatenate the messages when I look at the sample tests or, even best, when I read the description?
Hi,
The description is far from sufficient:
the description is here to give specifications! ;p
Random tests aren't random. Picking a test case from your defined list isn't good enough.