Task: Program Execution
Input (English): 7, 18, ['5091', 'H', 'a', 'm', '5799', 'g', 'R', 'Y', '6807', 'J', '8779', '5389', '6151', '3503', '6829', '9781', '5797', 'U']
Output (English): RY6807J8779538961513503682997815797U