
6 steps
wm9677wm9677
signature
13→43
rule

{{{1, 2, 1}} -> {{3, 2, 3}, {3, 2, 2}, {2, 1, 3}, {1, 4, 1}}}
{{{1, 2, 1}} -> {{3, 2, 3}, {3, 2, 2}, {2, 1, 3}, {1, 4, 1}}}