C312312111133131212111133133313331333133312133313231333133313221111   >>    C31231211113313121211113313331333133313331213331323133313331322111   <<    C312312111133131212111133133313331333133312133313231333133313221113   >>      C312312111133131212111133133313331333133312133313231333133313221112   >>