
7 steps
wm7921wm7921
signature
22→42
rule

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