using System;

public class Program {

    public static void Main() {

        Console.Write("Enter  first Name:");

        string firstName = Console.ReadLine();

        Console.Write("Enter last Name:");

        string lastName = Console.ReadLine();

        Console.WriteLine("Hello, " + firstName);

        Console.WriteLine(string.Format("Hello, blah {0} blah blah {1}", firstName, lastName));

    }

}