C11112331333132311331333133313331333112211231211113313113313231323321212121   >>    C1111233133313231133133313331333133311221123121111331311331323132332121212   <<    C11112331333132311331333133313331333112211231211113313113313231323321212123   >>      C11112331333132311331333133313331333112211231211113313113313231323321212122   >>