Task: Program Execution
Input (English): 9, ['8407', '4777', '581', 'B', '7771', '9949', '3265', 'r', 'm', '8487', 'N', '137', '7871', 'b', 'W', 'E', '4667', '5801', '1329']
Output (English): 8407, 8487, 1329