using System;

public class Program

{

    public static void Main()

    {

        Person person = new Person();

        person.displayName();

        person.displayName("Steve" + " " + "jobs");

    }

    class Person

    {

        public string firstName;

        public string lastName;

        public void displayName()

        {

            Console.WriteLine("You gat a beatiful Name");

        }

        public void displayName(string firstName)

        {

            Console.WriteLine(firstName +" "+ lastName);

            Console.WriteLine(this.firstName +" "+ this.lastName);

        }

        public Person() 

        {

            firstName = "Unknonwn";

            lastName = " Unknown";

        }

    }

}