![](assets/icon.png)
6 steps
wm1777wm1777
signature
12→2213
rule
![](assets/rule.png)
{{{1, 2}} -> {{2, 2, 3}, {1, 3}, {3, 1}}}
{{{1, 2}} -> {{2, 2, 3}, {1, 3}, {3, 1}}}