If you are allergic to the pairing but not the characters you are allowed to gen-ify it? Although if you're so allergic that just reading it would be a trial that wouldn't help. :/ On the other hand nobody else has signed up with Les Mis yet so if we both went in it would just be us, and I think I probably have at least one pairing you could write in there somewhere...

ETA: Also they show the requests summary, so you could wait to the last minute and see if any of the les mis requests have stuff you can write?