![](assets/icon.png)
6 steps
wm7844wm7844
signature
12→2213
rule
![](assets/rule.png)
{{{1, 2}} -> {{3, 4, 1}, {1, 4}, {4, 2}}}
{{{1, 2}} -> {{3, 4, 1}, {1, 4}, {4, 2}}}