![](assets/icon.png)
7 steps
wm9216wm9216
signature
22→42
rule
![](assets/rule.png)
{{{1, 2}, {2, 3}} -> {{3, 4}, {4, 3}, {3, 1}, {4, 2}}}
{{{1, 2}, {2, 3}} -> {{3, 4}, {4, 3}, {3, 1}, {4, 2}}}