C11112331333132311331333133313331333112211231211111211111211111333133322221   >>    C1111233133313231133133313331333133311221123121111121111121111133313332222   <<    C11112331333132311331333133313331333112211231211111211111211111333133322223   >>      C11112331333132311331333133313331333112211231211111211111211111333133322222   >>