At 0:18, I show you the technique to exchange the ring that you are pushing back with the central ring. If, in the beginning, you don't have the number 1 and 3 superposed (and it's crucial), I recommend changing the ring 3 for the ring 2 and then the ring 2 for the ring 3.You should end up with the same initial state but with the number 1 and 3 superposed.
![](https://s2.save4k.ru/pic/hNyLJmKyGEQ/maxresdefault.jpg)