C312312111133131212111133133313331333133312133313331333131232321311   >>    C31231211113313121211113313331333133313331213331333133313123232131   <<    C312312111133131212111133133313331333133312133313331333131232321313   >>      C312312111133131212111133133313331333133312133313331333131232321312   >>