Look at the pic and try to work out the solution. You’re looking for a common phrase (although I’m not sure how common this really is, perhaps more in America)

Chubby Rick has already guessed R, so there’s no R.

Now watch the vid: did you get it right?

Unfortunately for Caitlin her pinpoint answering netted her seven days in some Caribbean rat-hole. Bet she wishes she was on Bullseye instead.