C11112331333132311331333133313331333112211231211111333131133132221   >>    C1111233133313231133133313331333133311221123121111133313113313222   <<    C11112331333132311331333133313331333112211231211111333131133132223   >>      C11112331333132311331333133313331333112211231211111333131133132222   >>