C312312111133131212111133133313231333133313331333121111112211232322331   >>    C31231211113313121211113313331323133313331333133312111111221123232233   <<    C312312111133131212111133133313231333133313331333121111112211232322333   >>      C312312111133131212111133133313231333133313331333121111112211232322332   >>