C111123313331323113313331333133313331323132311233133313233311221123311   >>    C11112331333132311331333133313331333132313231123313331323331122112331   <<    C111123313331323113313331333133313331323132311233133313233311221123313   >>      C111123313331323113313331333133313331323132311233133313233311221123312   >>