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

namespace Mixed_up_Lists
{
    class Program
    {
        static void Main()
        {
            List<int> numList1 = Console.ReadLine()
                .Split()
                .Select(int.Parse)
                .ToList();

            List<int> numList2 = Console.ReadLine()
                .Split()
                .Select(int.Parse)
                .ToList();

            int startRange = 0;
            int endRange = 0;
            if (numList1.Count > numList2.Count)
            {
                startRange = Math.Min(numList1[numList1.Count - 1], numList1[numList1.Count - 2]);
                endRange = Math.Max(numList1[numList1.Count - 1], numList1[numList1.Count - 2]);
            }

            else
            {
                startRange = Math.Min(numList2[0], numList2[1]);
                endRange = Math.Max(numList2[0], numList2[1]);
            }

            List<int> numsInRange = new List<int>();

            numsInRange.AddRange(GetNumsInRange(numList1, startRange, endRange));
            numsInRange.AddRange(GetNumsInRange(numList2, startRange, endRange));

            numsInRange.Sort();

            Console.WriteLine(string.Join(' ', numsInRange));

        }

        static List<int> GetNumsInRange(List<int> numList, int startRange, int endRange)
        {
            List<int> getTheNums = new List<int>();

            for (int i = 0; i < numList.Count; i++)
            {
                if (numList[i] > startRange && numList[i] < endRange)
                    getTheNums.Add(numList[i]);
            }

            return getTheNums;
        }
    }
}