C312312111133131212111133133313331333133312133313231333132212131211   >>    C31231211113313121211113313331333133313331213331323133313221213121   <<    C312312111133131212111133133313331333133312133313231333132212131213   >>      C312312111133131212111133133313331333133312133313231333132212131212   >>