Shortest Formula Challenge!! (Game 8: Plates & Rand. Char.)

For those of you who like to test your formula skills, I developed a series of games (10 in all) where you can try to come up with the shortest formula possible to complete the objective. There are 2 challenges per game. Full rules are explained within the file. I'll post my best solutions a little later. Good luck!

(Game #8 is attached)

Also: Please post all formulas in white font to prevent spoilers!


Note: The challenges are targeted for advanced Excel users. They range in difficulty... but even the "easier" ones can be tricky.