
7 steps
wm7933wm7933
signature
22→42
rule

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