I need help with this question, I know that it follows a geometric sequence but that's about it.

(3) Two players A and B roll two fair dice independently and simultaneously at each step. The game will end as soon as the two players get different digits among {1, 2, 3, 4,5, 6}; and whoever with the greater digit will win the game. o7 follows Geom (a) Calculate the expected number of steps needed for the game to end. where