using System;

namespace _11.Increasing4Numbers
{
    class Increasing4Numbers
    {
        static void Main(string[] args)
        {
            var a = int.Parse(Console.ReadLine());
            var b = int.Parse(Console.ReadLine());

            if (b - a < 3)
            {
                Console.WriteLine("No");
            }


            for (int first = a; first <= b - 3; first++)
            {
                for (int second = first + 1; second <= b - 2; second++)
                {
                    for (int third = second + 1; third <= b - 1; third++)
                    {
                        for (int fourth = third + 1; fourth <= b; fourth++)
                        {
                            Console.WriteLine("{0} {1} {2} {3}",
                                first, second, third, fourth);
                        }
                    }
                }
            }
        }
    }
}