using System;

public class Program

{ //Vanesa Doneva

    public static void Main()

    {

​

        int a= int. Parse(Console.ReadLine());

        int b= int.Parse(Console.ReadLine());

        for(int i= a; a <= b; i++)

    {

            if(i%2 == 0)

            {

                Console.WriteLine(i);

}