using System;

public class Program

{

    public static void Main()

    {

        string test = "Dua Puluh Enam Juta Delapan Ratus Sembilan Ribu Tiga Ratus Tiga Puluh Rupiah";

        int firstRupiah = test.IndexOf(" Rupiah");

        Console.WriteLine("firstRupiah = "+firstRupiah);

        int secondRupiah = test.LastIndexOf(" Rupiah");

        Console.WriteLine("secondRupiah = "+secondRupiah);

        if(firstRupiah != secondRupiah){

            Console.WriteLine("test = "+test.Remove(secondRupiah, 7));

        }

    }

}