class Person:
    def __init__(self,name,age):
        self.name=name;
        self.age=age;
    def display(self):
        print("\n Name : ",self.name);
        print("Age : ",self.age);

class Student:
    def __init__(self,rollno,name,age):
        self.rollno=rollno;
        self.name=name;
        self.age=age;
    def display(self):
        print("\n Roll No : ",self.rollno);
        print("Name : ",self.name);
        print("Age : ",self.age);

class Employee:
    def __init__(self,eid,name,age,salary,desig):
        self.eid=eid;
        self.name=name;
        self.age=age;
        self.salary=salary;
        self.desig=desig;
    def display(self):
        print("\n Emp ID : ",self.eid);
        print("Name : ",self.name);
        print("Age : ",self.age);
        print("Salary : ",self.salary);
        print("Designation : ",self.desig);


        
