C11112331333132311331333133313331333112211231211111211111211111322332321   >>    C1111233133313231133133313331333133311221123121111121111121111132233232   <<    C11112331333132311331333133313331333112211231211111211111211111322332323   >>      C11112331333132311331333133313331333112211231211111211111211111322332322   >>