16 steps wm7441wm7441 signature 24→34 rule {{{1, 2, 3, 4}, {5, 3, 6, 7}} -> {{8, 2, 2, 9}, {4, 2, 6, 7}, {4, 9, 5, 1}}} {{{1, 2, 3, 4}, {5, 3, 6, 7}} -> {{8, 2, 2, 9}, {4, 2, 6, 7}, {4, 9, 5, 1}}}