
7 steps
wm9538wm9538
signature
22→42
rule

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