R, please.
Morwen, have you ever seen the game show "Wheel of Fotune?" That's how this is played. A player asks for a letter, and if there are any in the phrase, they are revealed. The puzzle is solved when a player can identify the full phrase. This isn't as rigidly structured as the game show; anybody can jump in at any time with the answer, and there aren't "turns" (although for myself, I think it's polite to wait until the result of my request is shown before asking for another letter). And I don't believe the person presenting the puzzle is obliged to offer hints, though it's nice when they do from time to time. Just FYI.
