5 steps wm1527wm1527 signature 13→43 rule {{{1, 2, 1}} -> {{3, 4, 3}, {4, 2, 2}, {1, 4, 2}, {5, 4, 5}}} {{{1, 2, 1}} -> {{3, 4, 3}, {4, 2, 2}, {1, 4, 2}, {5, 4, 5}}}