using System;
using System.Linq;
using System.Text.RegularExpressions;
 
public class Test
{
        public static void Main()
        {
                string input = Console.ReadLine();
                string[] bits = Regex.Matches(input, @"\w+(?:\W+\w+){0,4}")
                     .Cast<Match>()
                     .Select(match => match.Value)
                     .ToArray();
                foreach (string s in bits)
                {
                    Console.WriteLine(s);
                }
        }
}