A：What's your email address?
    B：It's bluedog123.
    A：Bluedog123. Are you sure that's all?
    B：Yes.
    A：No. That's incomplete.
    B：What do you mean?
    A：What's your mailing address?
    B：456 Cherry Drive, Pasadena, CA 91170.
    A：That's correct.
    B：So what's the problem?
    A：Bluedog123 is just the street. You have to give me the city, state, and ZIP code.
    B：Oh, I get it. My email address is bluedog123@yahoo.com.