Task: Program Execution
Input (English): 15, 21, ['J', 'l', '5285', '69', 'I', 'I', 'u', '8413', '2475', '1673', 'A', 'L', '5197', 'E', 'p', 'D', 'B', '4501', 'V', 'z', 'G', '3831']
Output (English): pDB4501VzG