Task: Program Execution
Input (English): 1, 4, ['1009', 'p', '661', 'P', '5449', '7657', 'p', '4751', '7547', 'L', '2671', 'P', '9999', 'p', '8869', '2061', '1623', 'V', '8685', 'r']
Output (English): P166p9001