
7 steps
wm1428wm1428
signature
22→42
rule

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