C11112331312111112111133133313331333133313123313331311331333133311233132312321   >>    C1111233131211111211113313331333133313331312331333131133133313331123313231232   <<    C11112331312111112111133133313331333133313123313331311331333133311233132312323   >>      C11112331312111112111133133313331333133313123313331311331333133311233132312322   >>