Amos, you are amazing. (Amazing Amos) It never occurred to me that it might be a trick question. (And I will definitely utilize Google from now on!) Now all I have to worry about is the people I have made angry! I think what I'll do is rephrase the riddle in the next newsletter and see what kind of response I get. (And I'll mail the answer ahead of time to the 15-year-old! 'Tis only fair...)

Thanks to both of you. I was almost sure I'd get an answer on Mudcat but I certainly never expected it so very quickly.