Task: Program Execution
Input (English): 4, ['2335', 'x', 'q', '2477', '411', 'Y', '4067', '5955', '7461', '4231', 'b', 'q', '193', '1315', 'Z', '181', 's', '5561', '1989', 'a', '2153', '4221']
Output (English): 2335, x, q, 2477