www.mikescher.com/www/statics/aoc/2018/12_input.txt

initial state: .##..#.#..##..##..##...#####.#.....#..#..##.###.#.####......#.......#..###.#.#.##.#.#.###...##.###.#

.##.# => #
##.#. => #
##... => #
#.... => .
.#..# => .
#.##. => .
.##.. => .
.#.## => .
###.. => .
..##. => #
##### => #
#...# => #
.#... => #
###.# => #
#.### => #
##..# => .
.###. => #
...## => .
..#.# => .
##.## => #
....# => .
#.#.# => #
#.#.. => .
.#### => .
...#. => #
..### => .
..#.. => #
..... => .
####. => .
#..## => #
.#.#. => .
#..#. => #