
7 steps
wm9189wm9189
signature
22→42
rule

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