using System;
using System.Linq;

namespace E07.PredicateForNames
{
    public class StartUp
    {
        public static void Main()
        {
            int charCount = int.Parse(Console.ReadLine());

            Func<string, bool> myFunc = x => x.Length <= charCount;

            var names = Console.ReadLine()
                .Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries)
                .OrderBy(n => n.Length)
                .Where(n=>myFunc(n))
                .ToList();

            names.ForEach(Console.WriteLine);
        }
    }
}