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

					
public class Program
{
	public static void Main()
	{
		// Student collection
		string[] name={"adsf","adgfgf","iuyjh","6r5ertgf"};
		
		// LINQ Query Syntax to find out teenager students
	var nm= from n in name where n.Contains("f") select n;
	
	foreach(string nam in nm)
	{
	   Console.WriteLine(nam);
	}
	}
}