03. Shopping Cart

def shopping_cart(*args):
    max_quantities = {"Soup": 3, "Pizza": 4, "Dessert": 2}
    cart = {"Soup": [], "Pizza": [], "Dessert": []}

    for command in args:
        if command == "Stop":
            break
        else:
            meal = command[0]
            product = command[1]
            if len(cart[meal]) < max_quantities[meal]:
                if product not in cart[meal]:
                    cart[meal].append(product)

    for value in cart.values():
        if len(value) > 0:
            break
    else:
        return 'No products in the cart!'

    result = ""
    for meal, products in sorted(cart.items(), key=lambda item: (-len(item[1]), item[0])):
        result += f"{meal}:\n"
        for product in sorted(products):
            result += f" - {product}\n"

    return result