Exam05

using System;

namespace Loops
{
    class Program
    {
        static void Main(string[] args)
        {
            int start = int.Parse(Console.ReadLine());
            int end = int.Parse(Console.ReadLine());
            if (start > end)
            {
                int temp = start;
                start = end;
                end = temp;
            }
            for (int a = start; a <= end; a++)
            {
                for (int b = start; b <= end; b++)
                {
                    for (int c = start; c <= end; c++)
                    {
                        for (int d = start; d <= end; d++)
                        {
                            if (d % 2 == 0)
                            {
                                Console.Write($"{a}{b}{c}{d} ");
                            }
                        }
                    }
                }
            }
            Console.WriteLine();
        }
    }
}