/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
class Animal {
    void sound() {
        System.out.println("동물");
    }
}
class Dog extends Animal {
    void sound() {
        System.out.println("강아지");
    }
}
class Cat extends Animal {
    void sound() {
        System.out.println("고양이");
    }
}
 
public class Main {
    public static void main(String[] args) {
Animal myDog = new Dog();
Animal myCat = new Cat();
 
myDog.sound(); 
myCat.sound(); 
 
    }
}

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