using System;
using System.Collections.Generic;
using System.Linq;

namespace FunctionalProgramming__PredicateForNames
{
    class Program
    {
        static void Main(string[] args)
        {
            int namesLenght = int.Parse(Console.ReadLine());

            string[] names = Console.ReadLine()
                .Split(" ", StringSplitOptions.RemoveEmptyEntries)
                .ToArray();

            Predicate<string> rightLenght = name => name.Length <= 4;

            foreach (var name in names)
            {
                if (rightLenght(name))
                {
                    Console.WriteLine(name);
                }
            }

        }
    }
}