advent_of_code/2018/day12_subterranean_sustainability/tests/challenge_input

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

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