How can I give a clue without telling the answer (SDR2)

So, to give some context. I'm watching someone play Super Danganronpa 2. And he's basically right before the chapter 3 body discovery.

He'll eventually get to the final dead room and I'm concerned about him struggling a lot with the puzzle, especially with the otello part but also with the puzzle in general.

I REALLY don't like when let'splayers have to resort to look it up because that's by far the easiest way to get spoiled, not only about that case, but also for important twists from later on or even the whole franchise. And he's pretty adamant about avoiding spoilers too and not looking things up.

So I kinda want to leave a relatively short comment during chapter 3 that he could maybe look up and read so that he could use that as a guide and avoid spoilers.

Any idea about how can I explain the otello part (and any other tricky part of the puzzle) without literally telling him the answer?

I know the game straight up tells you the answer if you asks Monomi for advice. But I feel that kinda ruins the enjoyment of any person playing.

So, any ideas?