﻿#include <iostream>
using namespace std;

class Person {
    public:
        void displayPerson() {
            cout << "Person Class" << endl;
        }
};

class Student : public Person {
    public:
        void displayStudent() {
            cout << "Student Class" << endl;
        }
};

class GraduateStudent : public Student {
    public:
        void displayGraduateStudent() {
            cout << "Graduate Student Class" << endl;
        }
};

int main() {
    GraduateStudent student;

    student.displayPerson();
    student.displayStudent();
    student.displayGraduateStudent();

    return 0;
}