using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            char[] roz = { '\n', ' ', '\r' };
            String[] p1 = System.IO.File.ReadAllText(@"A1.TXT").Split(roz, System.StringSplitOptions.RemoveEmptyEntries);
            String[] p2 = System.IO.File.ReadAllText(@"A2.TXT").Split(roz, System.StringSplitOptions.RemoveEmptyEntries);

            StreamWriter sw = new StreamWriter(@"B.TXT");

            int pozice1 = 0;
            int pozice2 = 0;
            while(true)
            {
                if (pozice2 == p2.Length)
                {
                    for (int i = pozice1; i < p1.Length; i++)
                    {
                        sw.Write((Convert.ToInt32(p1[i]) + " "));
                    }
                    break;
                }
                if (pozice1 == p1.Length)
                {
                    for (int i = pozice2; i < p2.Length; i++)
                    {
                        sw.Write((Convert.ToInt32(p2[i]) + " "));
                    }
                    break;
                }
                if (Convert.ToInt32(p1[pozice1]) <= Convert.ToInt32(p2[pozice2]))
                {
                    sw.Write((Convert.ToInt32(p1[pozice1]) + " "));
                    pozice1++;
                }else
                if (Convert.ToInt32(p1[pozice1]) >= Convert.ToInt32(p2[pozice2]))
                {
                    sw.Write(Convert.ToInt32(p2[pozice2]) + " ");
                    pozice2++;
                }
            }
            sw.Close();
        }
    }
}