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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'd rather be lazy than greedy.
Good kata to learn about greedy behavior.
No random tests.
Ruby and Python translation submitted, if you wish to approve them; I had some trouble submitting the Ruby translation, so if anyone has issues, just porter under here :)
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The examples make it clear he's talking about quotes and not quotation marks.
In your description, you say "only quotes", but that could easily be taken as
"
characters, not "a series of characters with double-quotes at either end".