C312312111133131212111133133313231333133313331333133112332313221211   >>    C31231211113313121211113313331323133313331333133313311233231322121   <<    C312312111133131212111133133313231333133313331333133112332313221213   >>      C312312111133131212111133133313231333133313331333133112332313221212   >>