#N Switch engine
#O Charles Corderman
#C A methuselah with lifespan 3911 that can be used to make c/12 diagonal puffers and spaceships.
#C www.conwaylife.com/wiki/index.php?title=Switch_engine
x = 6, y = 4, rule = B3/S23
bobo2b$o5b$bo2bob$3b3o!