C11112331312111112111133133313331333133313331333133313331333131133131231212121   >>    C1111233131211111211113313331333133313331333133313331333133313113313123121212   <<    C11112331312111112111133133313331333133313331333133313331333131133131231212123   >>      C11112331312111112111133133313331333133313331333133313331333131133131231212122   >>