I'm new, so I'm not clear: if we request one where both characters are hurt, would that require our writer to write fic where both are hurt? Or could they choose one or the other to be hurt?

To put it another way, I would read fic where either Character A or Character B is hurt--I'm not picky! But I don't really need both characters to be hurt in the same fic. So would I request both Character A/Character B (hurt Character A) and Character A/Character B (hurt Character B)?