#N Surprise
#O David Buckingham
#C A period 3 oscillator found in November 1972.
#C www.conwaylife.com/wiki/index.php?title=Surprise
x = 10, y = 9, rule = B3/S23
3bo4b2o$3b3o2bob$b2o3bobob$o2b2obob2o$bo6bob$2obob2o2bo$bobo3b2ob$bo2b
3o3b$2o4bo!