#N C-heptomino
#C A methuselah with lifespan 148 that evolves in the same way as the B-heptomino after its second generation.
#C http://www.conwaylife.com/wiki/index.php?title=C-heptomino
x = 4, y = 3, rule = B3/S23
b3o$3ob$bo!