C11112331312111112111133133313331333133313331333112211232223331   >>    C1111233131211111211113313331333133313331333133311221123222333   <<    C11112331312111112111133133313331333133313331333112211232223333   >>      C11112331312111112111133133313331333133313331333112211232223332   >>