16 steps wm2515wm2515 signature 32→52 rule {{{1, 2}, {2, 1}, {1, 3}} -> {{1, 1}, {2, 1}, {2, 4}, {4, 3}, {3, 4}}} {{{1, 2}, {2, 1}, {1, 3}} -> {{1, 1}, {2, 1}, {2, 4}, {4, 3}, {3, 4}}}