1 steps
wm5927wm5927
signature
22→1222→32
rule
{{{1, 1}, {2, 1}} -> {{1, 1}}, {{1, 2}, {2, 3}} -> {{2, 4}, {4, 3}, {1, 3}}}
{{{1, 1}, {2, 1}} -> {{1, 1}}, {{1, 2}, {2, 3}} -> {{2, 4}, {4, 3}, {1, 3}}}
make editable copy
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