Task: Program Execution
Input (English): 4, ['2279', '5911', 'S', '2219', '727', 'W', '6459', 'U', '9311', '3413', '457', 'P', '5607', 'p', '1093', 'O', '4553']
Output (English): 2279, 727, 9311, 5607, 4553