![](assets/icon.png)
7 steps
wm9438wm9438
signature
22→42
rule
![](assets/rule.png)
{{{1, 2}, {2, 3}} -> {{3, 4}, {4, 3}, {1, 3}, {2, 4}}}
{{{1, 2}, {2, 3}} -> {{3, 4}, {4, 3}, {1, 3}, {2, 4}}}