Task: Program Execution
Input (English): 18, 20, ['4063', 'E', 'U', 'I', '4943', '2645', 'G', '9493', '3141', 'z', '9381', 'W', 'A', 'J', 'q', 'A', '5', 'e', '6009', 'v']
Output (English): e6009v