
7 steps
wm7467wm7467
signature
22→42
rule

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