Man, eyes, nose and head, enter three numbers.

Guessing is an intellectual game with a long history, which originated from the Eight Diagrams of the Book of Changes in China. Guessing refers to guessing something or words within a specified range according to certain rules through given suggestive words or images. China lantern riddles are the most common form of guessing riddles, and people often consciously use the characteristics of Chinese to solve riddles.