You can count to three.
You can push it back:
When you count to 30, you must control 26(30-4), because when you count to 26, others count 1, you count 3, others count 2, you count 2, others count 3, and you count 1.
Similarly, 22(26-4) is a number that needs to be controlled.
Similarly,. 18 (22-4) is also a number to be controlled.
..........
Similarly, 2(6-4) is also a number to be controlled.
The first number is 1, and 2 can control 2. So, the first to count wins.
The first number is 1, 2, the last number is 1, the first number is 3, the last number is 2, the last number is 3, and the first number is 1(4' s complement).