using System;

public class Program

{

    public static void Main() 

    { 

        // string 

        String str = "Geeks For Geeks"; 

        Console.WriteLine("OldString: " + str); 

        // replace the character 's' with 'G' 

        Console.WriteLine("NewString: " + str.Replace('s', 'G')); 

        // oldString will remain unchanged 

        // its return the modified string 

        Console.WriteLine("\nOldString: " + str); 

        // replace the character 'e' with space ' ' 

        Console.WriteLine("NewString: " + str.Replace('e', ' ')); 

    } 

}