C111123313331323113313331333133313331323132311233133311211311111   >>    C11112331333132311331333133313331333132313231123313331121131111   <<    C111123313331323113313331333133313331323132311233133311211311113   >>      C111123313331323113313331333133313331323132311233133311211311112   >>