Task: Program Execution
Input (English): 16, 16, ['5357', 'd', '4005', '8717', '243', 'c', '2969', 'q', 'X', '7229', 'J', 'g', '4785', 'J', 'H', 'x', 'l', '8433', '7067', '2865', 'm']
Output (English): x