![](assets/icon.png)
9 steps
wm7373wm7373
signature
22→42
rule
![](assets/rule.png)
{{{1, 2}, {2, 3}} -> {{4, 2}, {4, 2}, {4, 1}, {3, 4}}}
{{{1, 2}, {2, 3}} -> {{4, 2}, {4, 2}, {4, 1}, {3, 4}}}