![](assets/icon.png)
3 steps
wm77411wm77411
signature
12→42
rule
![](assets/rule.png)
{{{1, 2}} -> {{1, 3}, {3, 2}, {2, 4}, {4, 1}}}
{{{1, 2}} -> {{1, 3}, {3, 2}, {2, 4}, {4, 1}}}