
8 steps
wm5588wm5588
signature
22→42
rule

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