C11112331333132311331333133313331333112211231211113313331333133313123112121   >>    C1111233133313231133133313331333133311221123121111331333133313331312311212   <<    C11112331333132311331333133313331333112211231211113313331333133313123112123   >>      C11112331333132311331333133313331333112211231211113313331333133313123112122   >>