C11112331312111112111133133313331333133311222121111121111121223321   >>    C1111233131211111211113313331333133313331122212111112111112122332   <<    C11112331312111112111133133313331333133311222121111121111121223323   >>      C11112331312111112111133133313331333133311222121111121111121223322   >>