Task: Program Execution
Input (English): 7, 9, ['x', '9909', 'E', '4053', 'E', '1101', '1931', '6241', 'D', '3861', 'H', 'L', 'u', 'v', 'b', '5403', '4395', '2427', '1127']
Output (English): 8172