7 steps
wm5541wm5541
signature
22→4222→12
rule
{{{1, 2}, {2, 3}} -> {{1, 4}, {4, 1}, {1, 3}, {2, 4}}, {{1, 2}, {3, 2}} -> {{1, 2}}}
{{{1, 2}, {2, 3}} -> {{1, 4}, {4, 1}, {1, 3}, {2, 4}}, {{1, 2}, {3, 2}} -> {{1, 2}}}
make editable copy
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