Dorothy: Ma, are you sure you mailed all the invitations? None of the Gs through the Ls has responded.
Sophia: Of course I did. They were in a shoebox I took to the post office last week. Unless...
Dorothy: Unless what?
Sophia: Unless I sent my best pair of heels overnight mail.
Dorothy: Ma, this is terrible!
Sophia: You're telling me. Now I don't have shoes for the party.