
9 steps
wm1218wm1218
signature
22→42
rule

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