C11112331312111112111133133313331333133313123313331311331333112211232231   >>    C1111233131211111211113313331333133313331312331333131133133311221123223   <<    C11112331312111112111133133313331333133313123313331311331333112211232233   >>      C11112331312111112111133133313331333133313123313331311331333112211232232   >>