C11112331312111112111133133313331333133313123313331311331323232133313232223321   >>    C1111233131211111211113313331333133313331312331333131133132323213331323222332   <<    C11112331312111112111133133313331333133313123313331311331323232133313232223323   >>      C11112331312111112111133133313331333133313123313331311331323232133313232223322   >>