using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Console.WriteLine(Replace("My name is name","name","saritha"));

    }

    static string Replace(string str, string originalstr, string replaceStr){

        int indexOfOriginalstr=0;

        char[] charArray=str.ToCharArray();

        for(int i=0;i<str.Length;i++){

            if(str[i]==originalstr[0]){

                indexOfOriginalstr=i;

            }

        }

        for(int j=0;j<originalstr.Length;j++){

            charArray[indexOfOriginalstr+j]=replaceStr[j];

        }

        return new string(charArray);

    }

}