using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.IO;

using System.Threading;

using System.Linq;

public class Program

{

    public static void Main()

    {

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

        string index = "1,3,5";

            if (index == "ALL") {

                serverStatus.Add("server1");

                serverStatus.Add("server2");

                serverStatus.Add("server3");

                serverStatus.Add("server4");

                serverStatus.Add("server5");

                serverStatus.Add("server6");

                serverStatus.Add("server7");

            } else {

                serverStatus = index.Split(',').ToList<string>();

                serverStatus = serverStatus.Select(s => s = "server" + s).ToList();

                //serverStatus.Add("server" + index);

                foreach (var x in serverStatus){

                    Console.WriteLine(x);

                }

            }

    }

}