50 steps wm5189wm5189 signature 23→43 rule {{{1, 2, 2}, {3, 4, 5}} -> {{6, 3, 3}, {1, 6, 7}, {8, 5, 1}, {4, 8, 9}}} {{{1, 2, 2}, {3, 4, 5}} -> {{6, 3, 3}, {1, 6, 7}, {8, 5, 1}, {4, 8, 9}}}