C11112331312111112111133133313331333133313331333112211231323111   >>    C1111233131211111211113313331333133313331333133311221123132311   <<    C11112331312111112111133133313331333133313331333112211231323113   >>      C11112331312111112111133133313331333133313331333112211231323112   >>