class Dish:
    def __init__(self, values = []):
        self.values = values

    def put(self, ingredient):
        self.values.append(ingredient)

    def append(self, bowl):
        self.values.extend(bowl.values)

    def serves (self):
        p = self.values
        p.reverse()
        return p
    def __str__(self):
        return str(self.values)