Task: Program Execution
Input (English): 18, 21, ['1317', 'f', 'e', 'P', 'W', '9827', 'k', 'Z', 'n', 'P', 's', 'L', '3991', '9543', '9433', 'Z', '449', 'v', '8233', 'f', '8217', '8493', '1343', 'U', 'J', '7069', '7397', '9799']
Output (English): v8233f8217