C11112331312111112111133133313331333133313123313331311331333133311233132313131   >>    C1111233131211111211113313331333133313331312331333131133133313331123313231313   <<    C11112331312111112111133133313331333133313123313331311331333133311233132313133   >>      C11112331312111112111133133313331333133313123313331311331333133311233132313132   >>