class Person{
	protected String name;
	protected int age;
	public Person(String name,int age){
		this.name=name;
		this.age=age;
	}
	public String getname(){
		return this.name;
	}
	public void setname(String name) {
		this.name=name;
	}
	public int getage(){
		return this.age;
	}
	public void setage(int age) {
		this.age=age;
	}	
}
class Student extends Person{
	protected int score;
	public Student(String name,int age,int score){
		super(name,age);
		this.score=score;
	}
	public int getscore() {
		return this.score;
	}
}
class Primarystudent extends Student{
	protected int grade;
	public Primarystudent(String name,int age,int score,int grade) {
		super(name,age,score);
		this.grade=grade;
	}
	public int getgrade(){
		return this.grade;
	}
}
public class Main{
	public static void main(String[] args) {
		Person p=new Person("xiaoming",12);
		Student s=new Student("xiaohong",20,99);
		Primarystudent ps=new Primarystudent("xiaojun",9,100,5);
		System.out.println(ps.getname());
		System.out.println(ps.getage());
		System.out.println(ps.getscore());
		System.out.println(ps.getgrade());
	}
}