Task: Program Execution
Input (English): 14, 20, ['F', 'L', '7689', 'N', 'D', '9869', '9651', 'o', 'e', 'J', 'n', '8909', '671', 'v', '7017', '1181', 'U', '9849', '1707', 'd', '3943', '2107', 'a']
Output (English): d17079849U11817017v