C312312111133131212111133133313331333133312133313231333132211111   >>    C31231211113313121211113313331333133313331213331323133313221111   <<    C312312111133131212111133133313331333133312133313231333132211113   >>      C312312111133131212111133133313331333133312133313231333132211112   >>