C11112331333132311331333133313331333112211231211113313331333133313113323211   >>    C1111233133313231133133313331333133311221123121111331333133313331311332321   <<    C11112331333132311331333133313331333112211231211113313331333133313113323213   >>      C11112331333132311331333133313331333112211231211113313331333133313113323212   >>