C11112331333132311331333133313331333112211231211111211111211111333111211   >>    C1111233133313231133133313331333133311221123121111121111121111133311121   <<    C11112331333132311331333133313331333112211231211111211111211111333111213   >>      C11112331333132311331333133313331333112211231211111211111211111333111212   >>