Task: Program Execution
Input (English): 19, 21, ['8387', 'u', '9583', '7741', 'U', 's', 'P', 'F', '1661', '9951', 'y', '5493', '2485', '9581', '6643', 's', 'i', 'V', 'Z', '2727', '8341', 'x', 'n', '2135']
Output (English): 83412727Z