import java.util.Scanner;
import java.io.PrintStream;

public class Test4K
{
   public static void main(String[] arguments)
   {
      PrintStream output = System.out;
      Scanner input = new Scanner(System.in);

      output.print("Enter a positive integer: ");
      final int M = input.nextInt();

      output.print("Enter a positive integer larger than the first one: ");
      final int N = input.nextInt();

      for (int i = M; i <= N; i++)
      {
	  if (i % 2 == 0)
	  {
	      output.println(i);
	  }
      }

   }
}