C312312111133131212111133133313331333133312133313331333113313233221   >>    C31231211113313121211113313331333133313331213331333133311331323322   <<    C312312111133131212111133133313331333133312133313331333113313233223   >>      C312312111133131212111133133313331333133312133313331333113313233222   >>