12 steps wm59188wm59188 signature 1213→2223 rule {{{1, 2, 3}, {3, 4}} -> {{5, 5, 5}, {5, 6, 4}, {3, 1}, {1, 5}}} {{{1, 2, 3}, {3, 4}} -> {{5, 5, 5}, {5, 6, 4}, {3, 1}, {1, 5}}}