C11112331333132311331333133313331333112211231211113313331323233311   >>    C1111233133313231133133313331333133311221123121111331333132323331   <<    C11112331333132311331333133313331333112211231211113313331323233313   >>      C11112331333132311331333133313331333112211231211113313331323233312   >>