class Turtle:
    def __init__(self,x):
        self.num = x

class Fish:
    def __init__(self,x):
        self.num = x

class Poor:
    def __init__(self,x,y):
        self.turtle = Turtle(x)
        self.fish = Fish(y)

    def print_num(self):
        print("水池里有乌龟 %d 只 小鱼 %d 条" %(self.turtle.num,self.fish.num))
