![](assets/icon.png)
6 steps
wm9284wm9284
signature
12→2213
rule
![](assets/rule.png)
{{{1, 2}} -> {{2, 3, 4}, {1, 3}, {3, 4}}}
{{{1, 2}} -> {{2, 3, 4}, {1, 3}, {3, 4}}}