Fix emails

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

namespace FixEmails
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            var dict = new Dictionary<string, string>();

            while (input != "stop")
            {
                dict[input] = Console.ReadLine();
                input = Console.ReadLine();
            }

            Console.WriteLine(String.Join("\n", dict.Select(x => x.Key + " -> " + x.Value)
                .Where(x => !(new string[] { ".us", ".uk" }
                .Contains(x.Substring(x.Length - 3))))));
        }
    }
}