using System;

public class Program

{

    public static void Main()

    {

        string founder = "Marina james is a founder of C# Corner";

        string first25 = founder.Remove(25);

        Console.WriteLine(first25);

        string newStr = founder.Remove(10,12);

        Console.WriteLine(newStr);

        int pos = founder.IndexOf("founder");

        if (pos>=0)

        {

            string afterFounder = founder.Remove(pos);

            Console.WriteLine(afterFounder);

            string beforeFounder = founder.Remove(0, pos);

            Console.WriteLine(beforeFounder);

        }

    }

}