When my boyfriend and I are together, we always play with a rock scissors cloth from South Korea. First, in the first round, they make any gesture in the rock scissors cloth, and judge whether they win or lose according to the gesture. The winner first calls out any name in the rock scissors cloth, and at the same time, his gesture can be changed or not. At this moment, when the loser hears the password, he must change his gesture immediately. The gesture cannot be consistent with the shouted password.