C11112331312111112111133133313331333133313331333133313113313231322333121   >>    C1111233131211111211113313331333133313331333133313331311331323132233312   <<    C11112331312111112111133133313331333133313331333133313113313231322333123   >>      C11112331312111112111133133313331333133313331333133313113313231322333122   >>