File day12-input.txt from the latest check-in
initial state: .#..##..#.....######.....#....####.##.#.#...#...##.#...###..####.##.##.####..######......#..##.##.## #.... => . .##.# => # #..## => . ....# => . ###.# => # ...#. => # #...# => # #.### => . .#... => # ...## => . ..### => . ####. => . ##.## => . ..##. => . .#.## => # #..#. => # ..... => . #.#.. => . ##.#. => # .#### => # ##### => . #.##. => # .#..# => # ##... => . ..#.# => # ##..# => # .###. => . .#.#. => # #.#.# => # ###.. => . .##.. => . ..#.. => .