Task: Program Execution
Input (English): 15, 15, ['2637', '4471', 'O', 'J', 'D', '3963', '6115', 'k', '8523', 'j', '8651', 'l', 'A', 'j', 'N', '5797', 'K', 'G', '8675', '1913', 'e']
Output (English): N