![](assets/icon.png)
9 steps
wm74486wm74486
signature
22→42
rule
![](assets/rule.png)
{{{1, 2}, {3, 2}} -> {{4, 1}, {1, 2}, {2, 4}, {4, 3}}}
{{{1, 2}, {3, 2}} -> {{4, 1}, {1, 2}, {2, 4}, {4, 3}}}