C312312111133131212111133133313331333133312133313231333133323221211   >>    C31231211113313121211113313331333133313331213331323133313332322121   <<    C312312111133131212111133133313331333133312133313231333133323221213   >>      C312312111133131212111133133313331333133312133313231333133323221212   >>