Task: Program Execution
Input (English): 15, 18, ['X', 'U', 'I', 'l', '9503', 'd', 'U', '2603', 'C', 'X', 'D', '9327', 'J', 'g', 'K', '9047', 'D', 'x', '6439', '6323', 'H']
Output (English): 9047