using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<string> listA = new List<string>();

        List<string> listB = new List<string>();

        List<string> listC = new List<string>();

        listA.Add("Gata");

        listA.Add("Perra");

        listA.Add("Perra");

        listB.AddRange(listA);

        for (int i=0; i < listB.Count; i++)

        {

            Console.WriteLine("item "+ i +" is " + listB[i]);

        }   

    }

}