using System;

using System.Collections.Generic;   

​

public class Program {  

    public static void Main() {

        List<string> items = new List<string>() {"krowa", "dua", "cia", "chj" , "luk" , "uko", "popo", "iko", "seko", "hunt"};

        Console.WriteLine(items.IndexOf("d"));

    }

}