Again, thanks, but I found the instructions misleading. Someone mentioned the unusual grid, and I noticed six arrows there, and so tried to make two serpentine words around these. I also assumed, as changing two words created six new ones each, that it had to be the two nine-letter words that had to be switched, as they had five down lights, giving six new words each. And I know what errant means, but it just didn't seem relevant. The problem is like those magic eye tricks of a few centuries ago. If you look for the answer and think deeply, logically and intelligently, you can't find it. Just relax, let your eyes go out of focus and feel the force. I have to say I usually complete these in much less time than this one. And I usually feel less like totally giving up.