Task: Program Execution
Input (English): 1, 3, ['h', 'x', '1535', '6707', '3931', '5661', 'D', '1805', '1407', '4649', '9405', '3833', '8391', 'C', 'z', '8383', 'f', 'i', 'u', 'i', '1741']
Output (English): hx1535