using System;
using System.Collections.Generic;
using System.Linq;

namespace ConsoleApp184
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> firstNumbers = Console.ReadLine().Split().Select(int.Parse).ToList();
            List<int> secondNumbers = Console.ReadLine().Split().Select(int.Parse).ToList();
            List<int> mixedNumbers = new List<int>();

            FindElementsToPrint(firstNumbers, secondNumbers, mixedNumbers);

        }


        private static void FindElementsToPrint(List<int> firstNumbers, List<int> secondNumbers, List<int> mixedNumbers)
        {
            int startRange = 0;
            int endRange = 0;
            secondNumbers.Reverse();
            for (int i = 0; i < Math.Min(firstNumbers.Count, secondNumbers.Count); i++)
            {

                mixedNumbers.Add(firstNumbers[i]);
                mixedNumbers.Add(secondNumbers[i]);

            }
            if (firstNumbers.Count > secondNumbers.Count)
            {
                startRange = firstNumbers[firstNumbers.Count-2];
                endRange = firstNumbers[firstNumbers.Count-1];
            }
            else if(secondNumbers.Count>firstNumbers.Count)
            {
                startRange = secondNumbers[secondNumbers[1]];
                endRange = secondNumbers[secondNumbers[0]];
            }
            for (int i = 0; i < mixedNumbers.Count; i++)
            {
                mixedNumbers.RemoveAll(element => element >= startRange);
                mixedNumbers.RemoveAll(element => element <= endRange);
             }

            mixedNumbers.Sort();
            Console.Write(String.Join(" ",mixedNumbers));
            Console.WriteLine();





        }
    }
}