C11112331312111112111133133313331333133313331333133313331333131232313223121   >>    C1111233131211111211113313331333133313331333133313331333133313123231322312   <<    C11112331312111112111133133313331333133313331333133313331333131232313223123   >>      C11112331312111112111133133313331333133313331333133313331333131232313223122   >>