! "main" (cells 36 length 12 width 13 generation 0)
! A period 3 c/3 spaceship with a domino spark at the left edge.
! Stephen Silver, 1999
4k@!
....O
...OOOO
..O...OO.OO
..O...O..OO
O.......O..O
O
..O.OO
....OO
....OO....OO
.......OO.OO
.......OO...O
.......OO
