using System;

public class Program

{

    static void insert()                    //insert string

    {

        string s1 = "Ve skole se kouri!";

        string s2 = "ne";

        Console.WriteLine(s1.Insert(12, s2));   

    }

    static void substring()                     //substring 

    {

        string s1 = "Ve skole se kouri!";

        Console.WriteLine(s1.Substring(4,9));

    }

    static void compare()                       //compare

    {

        string a = "ucitel"; 

        string b  = "zak";

        Console.WriteLine(a.CompareTo(b));

    }

    static void remove()                    //remove

    {

        string x = "zaciname programovat v cecku";

        Console.WriteLine(x.Remove(10,10));

    }

    public static void Main()

    {

        compare();

    }

​

}