using System;
using System.Collections.Generic;
public class Program
{
public static void Main(string[] args)
{
string str = "C# is a general purpose high level programming language";
int length = 6;
string[] array = str.Split(' ');
List<string> list = new List<string>();
foreach (string s in array) {
if (s.Length > length) {
list.Add(s);
}
}
Console.WriteLine(String.Join(", ", list));
}
}
/*
run:
general, purpose, programming, language
*/