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);
}
}
}
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