6 steps wm4837wm4837 signature 23→43 rule {{{1, 2, 3}, {4, 5, 6}} -> {{7, 1, 1}, {7, 3, 6}, {7, 2, 5}, {8, 6, 9}}} {{{1, 2, 3}, {4, 5, 6}} -> {{7, 1, 1}, {7, 3, 6}, {7, 2, 5}, {8, 6, 9}}}