20 steps wm5489wm5489 signature 23→33 rule {{{1, 2, 3}, {3, 4, 5}} -> {{6, 5, 7}, {2, 7, 5}, {6, 4, 1}}} {{{1, 2, 3}, {3, 4, 5}} -> {{6, 5, 7}, {2, 7, 5}, {6, 4, 1}}}