using System;

using System.Collections.Generic;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        var pattern = @"^([A-Z]{1}[a-z]+ [A-Z]{1}[a-z]+)$";

        var regex = new Regex(pattern);

        var names = new List<string>();

        while(true)

        {

            var input = Console.ReadLine();

            if(input == "end")

            {

               break;   

            }

            var match = regex.Match(input);

            if(match.Success)

            {

                names.Add(match.Groups[1].Value);

            }

        }

        foreach(var name in names)

        {

            Console.WriteLine(name);

        }

    }

}