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

namespace _02.Track_Downloader
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> input = Console.ReadLine().Split().ToList();
            List<string> cleanList = new List<string>();
            string fileNames = Console.ReadLine();

            while (!fileNames.Equals("end"))
            {
                for (int i = 0; i < input.Count; i++)
                {
                    if (!fileNames.Contains(input[i]))
                    {
                        cleanList.Add(fileNames);
                    }
                    else
                    {
                        break;
                    }
                }

                fileNames = Console.ReadLine();
            }
            Console.WriteLine(string.Join("\r\n", cleanList.Distinct().OrderBy(x => x)));
        }
    }
}