
7 steps
wm3217wm3217
signature
22→42
rule

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