Task: Program Execution
Input (English): 1, 5, ['1705', 'r', '3897', '4473', '301', '3339', '9807', 'X', '4867', '2463', '1213', '6053', '3891', '2927', '3969', 'U', 'i', 'W', 'Q', 'H']
Output (English): 1705, 3339, 1213, U