Legend has it that in ancient Greek mythology, King Sisyphus of Corinth was punished for pushing a boulder all the way to the top of the mountain, but no matter how hard he tried, the boulder always rolled down before reaching the top of the mountain, so he had to push it again and never stopped. The world-famous String of Sisyphus is named after this story.

What is a Sisyphus string? It is a random number, such as 35962. Count the even numbers, odd numbers and all numbers in this number, and you can get 2(2 even numbers), 3(3 odd numbers) and 5 (a total of * * * 5 numbers). These three numbers are used to form the next number string 235. Repeat the above process with 235, and you can get 1.

Does every number end with 123? Please try to use a larger number, such as 88883377492222. In this number, even, odd and all numbers are 1 1, 9 and 20 respectively. These three numbers are combined to get 1 1920, 165438.

This is the famous mathematical black hole "Sisyphus string". Students study hard to discover the mystery!