Originally Posted By: tsuwm
well, you could try words with repeated letters -- that would make the task somewhat easier.

Actually, I think you can pretty much eliminate all 3 or more letter words with repeated letters because one of the combinations is going to be starting with the two repeated letters and another is going to end with the two repeated letters.

There are some words end in double letters (butt, ass, ...) but not too many start with double letters (aardvark, oocyst, ... um... ). I don't think those two sets are going to intersect.