C111123313331323113313331333133313331323132311233133313111121111   >>    C11112331333132311331333133313331333132313231123313331311112111   <<    C111123313331323113313331333133313331323132311233133313111121113   >>      C111123313331323113313331333133313331323132311233133313111121112   >>