#N Mold on fumarole
#C The smallest known period 20 oscillator. It is non-trivial because 
#C of a single cell that oscillates at period 20.
#C www.conwaylife.com/wiki/index.php?title=Mold_on_fumarole
x = 9, y = 14, rule = b3/s23
3b2o4b$2bo2bo3b$bobobo3b$bo2bo4b$o8b$bobo5b2$4b2o3b$2bo4bob$2bo4bob$2b
o4bob$3bo2bo2b$bobo2bobo$b2o4b2o!