>>716 ruby 63ターン以降２周期ループ(62,63,62,63,,,)
life = '.*...**.*.***..'
bord = life.tr('.*','01').to_i(2)
mask = 2 ** life.size - 1
fmt = "%%0%db" % life.size
bords = {bord=>true}
100.times{|gene|
puts "%5d %s" % [gene+1, (fmt % bord).tr('01','.*')]
bord2 = (bord<<1 ^ bord>>1 | bord<<1 & bord>>1 & ~bord) & mask # rule >>706, >>716
break if bords[bord2]
bord = bord2
bords[bord] = true
}