![](assets/icon.png)
6 steps
wm1653wm1653
signature
12→2213
rule
![](assets/rule.png)
{{{1, 2}} -> {{3, 2, 1}, {1, 3}, {3, 2}}}
{{{1, 2}} -> {{3, 2, 1}, {1, 3}, {3, 2}}}