C312312111133131212111133133313331333133312133313331333132311221123123321   >>    C31231211113313121211113313331333133313331213331333133313231122112312332   <<    C312312111133131212111133133313331333133312133313331333132311221123123323   >>      C312312111133131212111133133313331333133312133313331333132311221123123322   >>