Task: Program Execution
Input (English): 7, 9, ['c', '5167', 'U', '4473', 'J', '7883', 'f', '3737', 'Y', '135', 'W', 'Q', 'P', 'O', 'r', 's', '7155', '1745', '971', 'l']
Output (English): Y, 3737, f