The fortune teller will know my last name by measuring my palm. strict

Not surprisingly, there is some math knowledge in it. There are 24 surnames printed on each card, and 24 squares are arranged on the paper with surnames on the ground. Each square contains 15 surnames, covering almost all common surnames. When you find a card with your last name on it, and then find a square with your last name on a big piece of paper, there is only one word overlapping on the card and the square. This fortune-telling tool has no scientific content. It only uses permutation and combination when making cards and surnames on paper, so that only one surname can overlap at a time, and that overlapping word is your surname. Measuring the palm is just a trick to cheat you. Don't be cheated in the future.