C11112331312111112111133133313331333133313223223313231311331312312121   >>    C1111233131211111211113313331333133313331322322331323131133131231212   <<    C11112331312111112111133133313331333133313223223313231311331312312123   >>      C11112331312111112111133133313331333133313223223313231311331312312122   >>