FixEmails

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FixEmails
{
    class FixEmails
    {
        static void Main(string[] args)
        {
            var name = Console.ReadLine();
            var mailBook = new Dictionary<string, string>();
            while (name != "stop")
            {
                var mail = Console.ReadLine();
                var domain = mail.ToCharArray();
                domain=domain.Reverse().Take(2).Reverse().ToArray();
                string domainString = domain.ToString();
                Console.WriteLine("{0}",domainString);
                if (domainString=="us" || domainString=="uk")
                {
                    mailBook.Remove(name);
                }
                else
                {
                    mailBook[name] = mail;
                }
                name= Console.ReadLine();
            }
            foreach (var line in mailBook.Keys)
            {
                Console.WriteLine(string.Join(" -> ", line, mailBook[line]));
            }
        }
    }
}