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    This comment is hidden because it contains spoiler information about the solution

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    Can I ask why did you choose "f" as your variable over "i"? is there a word associated with it?

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    ^ one liner [562]

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    the same here. I had this problem once with another kata and turned out I was printing the value instead of returing it. this time I can't find any mistake but I gueess the problem is on our end again ;)

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    I'm getting the same output as it wants from me but it throws an error after testing. I double checked and changed the brackets, dashline and even added the quotation marks but it still says "None should equal '(123) 456-7890' "

    *Update: ah I'm sorry. It's sattled, I noticed I was printing the resault and not retruning it 🤦🏻‍♂️🤦🏻‍♂️