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    Not a kata issue, please read the description.

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    Exactly. You are misinterpreting the error message. "Expected 2 to equal 0" means "I got a 2 but it should have been a 0", i.e. you produced the 2.
    If you promise me a dog, but you give me a cat, I'd say "I expected the cat to be a dog".
    Not an issue.