A person is outside the door, and several people in the room take out nine playing cards, arrange them in three rows, and choose one in any way. People outside the house can guess which one it is when

A person is outside the door, and several people in the room take out nine playing cards, arrange them in three rows, and choose one in any way. People outside the house can guess which one it is when they come in. One of the few people in the room is Joe. I played this game.

Joe can tell people outside the house which card it is through actions and code words, such as touching his nose is the first line, touching his ears is the second line and scratching his head is the third line. Then, speak two paragraphs. In the first paragraph, there are several words that are the first few, such as "Quick! Guess quickly! " For the first picture, say "Hurry up! "Quick guess" refers to the second picture, which says "Hurry up! Guess! " Represents the third picture.

This kind of action is very hidden, and others have no doubt.