Task: Program Execution
Input (English): 20, 20, ['C', 'S', '1609', '9491', 'E', 'e', 'l', 'b', 'N', '3081', '3811', 'f', '8059', 'O', 'n', 'E', 'i', 'G', 'x', 'q', 'J', '973', 'G', '9869', 'U', 'r', '5783']
Output (English): q