how to make list of cars into string?

Please help with this function.

def car_list_as_string(cars: list) -> str:
    """
    Create a list of cars.
    The order of the elements in the string is the same as in the list.

    [['Audi', ['A4']], ['Skoda', ['Superb']]] =>
    "Audi A4,Skoda Superb"
    """

I tried this but it’s unfinished…got stuck.

for car in cars:
    print(car)
    cars2 = ''.join(str(car) for car in cars)
    print(cars2)
    one_car = str(car[0])
    print(one_car)
    one_model = str(car[1])
    print(one_model)

Input is: [[‘Audi’, [‘A4’]], [‘Skoda’, [‘Superb’]]]
Output should be: "Audi A4,Skoda Superb"

>Solution :

If you want a code who also work for multiple nested models:

def car_list_as_string(cars: list):
    output_list: list[str] = []

    for brand, models in cars:
        for model in models:
            output_list.append(f"{brand} {model}")

    cars_string = ",".join(output_list)