using System;

class Program

{

   public string ReplaceName(string name1, string name2, bool num)

   {

     if (num == true)

     {

         return name1;

     }

       else 

       {

            return name2;

       }

  public static void Main()

   {

   string x = ReplaceName(Masha,Ivan, false);

      Console.WriteLine(x);

   }

}

}