How do fortune tellers know other people's surnames?

He usually shows you a piece of paper with his last name on it. Generally, people who don't know will focus on finding his last name. The paper is specially arranged, and he will know as soon as your eyes stop. In the final analysis, it is a lie.

The landlord thought, if it is true, what is his life? Just guess the number directly at the door where the lottery ticket is sold.

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Every grid in it has a certain arrangement, among which there must be a common surname and an uncommon surname.

Of course, there are other ways.