![](assets/icon.png)
7 steps
wm4519wm4519
signature
22→42
rule
![](assets/rule.png)
{{{1, 2}, {2, 3}} -> {{1, 2}, {2, 1}, {4, 1}, {4, 3}}}
{{{1, 2}, {2, 3}} -> {{1, 2}, {2, 1}, {4, 1}, {4, 3}}}