class Meal:
    def __init__(self, kitchen):
        self.mainCourse = kitchen.mainCourse
        self.sideDish = kitchen.sideDish
        self.drink = kitchen.drink
        self.dessert = kitchen.dessert

    def __str__(self):
        return f"Mahlzeit: {self.mainCourse}, {self.sideDish},\
                {self.drink}, {self.dessert}"


class Kitchen:
    def __init__(self):
        self.mainCourse = None
        self.sideDish = None
        self.drink = None
        self.dessert = None

    def withMainCourse(self, mainCourse):
        self.mainCourse = mainCourse
        return self

    def withSideDish(self, sideDish):
        self.sideDish = sideDish
        return self

    def withDrink(self, drink):
        self.drink = drink
        return self

    def withDessert(self, dessert):
        self.dessert = dessert
        return self

    def giveOut(self):
        return Meal(self)


kitchen = Kitchen()
kitchen.withMainCourse("Burger")
kitchen.withSideDish("Pommes")
kitchen.withDrink("Wasser")
kitchen.withDessert("Muffin")