The word is VENGEANCE. When you look at the heart shaped graves there will be random letters that are capitalized, those are the letters that spell out the word. :)
I'm so sorry for the veeeery late reply. Are you talking about the part where you have to guess the numbers? Of so its a randomly generated code you het from guessing the right numbers, the codes will be under your item section. I hope thats the part you're talking about. Again, sorry for the late reply.