using System;

namespace C_Sharp_Junior
{
    class Program
    {
        static void Main()
        {
            string name = "Иванов";
            string surname = "Иван";
            string tempString;
            Console.WriteLine($"{name} {surname}");
            tempString = name;
            name = surname;
            surname = tempString;
            Console.WriteLine($"{name} {surname}");
            Console.ReadKey();
        }
    }
}