For example, if the main card is a square, then there is no square in the card. Among them, the cards you play, such as four, are not counted if four is a square. The second is the same as the fourth. And diamond 2, not counting. There is also the king, not the color. It must be another card. Except for the card 4 you played, it is not dry to have a square except for the card 2.