Task: Program Execution
Input (English): 15, 17, ['N', '7335', 'P', '3239', '6893', '9345', '8163', 'D', '7581', 'U', 'b', '9003', 'B', '2759', 'e', 'z', 'r', 'z', '2545', 'q', '5889', '4705', 'g']
Output (English): ezr