using System;

using System.Collections.Generic;                   

public class Program

{

    public static void Main()

    {

        List<int> numbers = new List<int>(){2,5,6,8,9,10};

        foreach(int n in numbers){

            Console.Write(" "+n);

        }

        Console.WriteLine(" ");

        numbers.Remove(6);

        foreach(int n in numbers){

            Console.Write(" "+n);

        }

        Console.WriteLine(" ");

        numbers.Add(65);

        foreach(int n in numbers){

            Console.Write(" "+n);

        }   

        Console.WriteLine(" ");

        Console.WriteLine(" "+numbers[1]*3);

        numbers.Sort();

        foreach(int n in numbers){

            Console.Write(" "+n);

        }   

        Console.WriteLine(" ");

        numbers.Reverse();

        foreach(int n in numbers){

            Console.Write(" "+n);

        }   

    }

}