C11112331312111112111133133313331312111111322331333133311212121   >>    C1111233131211111211113313331333131211111132233133313331121212   <<    C11112331312111112111133133313331312111111322331333133311212123   >>      C11112331312111112111133133313331312111111322331333133311212122   >>