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    There's no point in returning the number of matches.

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    The description is seriously lacking...

    • What exactly is a capitalized word?
    • Why is "A." a valid word? (and why is the expected output without period?)
    • Why is "ABC" invalid?
    • What about "AbCDEFG" ? "ABcD" ? Are those valid or not?

    Clear rules or examples need to be presented.