C11112331312111112111133133313331333133313223313331311331333133313231311233121   >>    C1111233131211111211113313331333133313331322331333131133133313331323131123312   <<    C11112331312111112111133133313331333133313223313331311331333133313231311233123   >>      C11112331312111112111133133313331333133313223313331311331333133313231311233122   >>