#N Mirrored dock
#C A 20-cell still life composed of two docks facing each other.
#C http://www.conwaylife.com/wiki/index.php?title=Mirrored_dock
x = 6, y = 7, rule = B3/S23
2o2b2o$o4bo$b4ob2$b4ob$o4bo$2o2b2o!