143 steps wm6715wm6715 signature 23→33 rule {{{1, 2, 2}, {3, 2, 4}} -> {{4, 3, 4}, {2, 1, 3}, {5, 1, 3}}} {{{1, 2, 2}, {3, 2, 4}} -> {{4, 3, 4}, {2, 1, 3}, {5, 1, 3}}}