Task: Program Execution
Input (English): 8, 9, ['2449', 'O', '5055', '9329', '2253', '4543', 'x', '2919', 'f', '5979', '1701', '6651', '4195', '7803', '5093', 'H', 'W', '1703', 'g', '3921', '7827', '9751', '7817', '6015']
Output (English): f2919