using System;

public class Program

{

    public static void Main()

    {

        int i, num,sum=0,digit,year;

        Console.WriteLine("Enter no :");

        num = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("even nos:");

        for(i=2;i<=num; i+=2)

        {

            Console.WriteLine(i);

        }

    }

}