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// 11в1new.cpp: определяет точку входа для консольного приложения.
//

#include "stdafx.h"
#include <fstream>
#include <iostream>
using namespace std;

int main()
{
    ifstream in1("in1.txt");
    ifstream in2("in2.txt");
    ofstream out("out.txt");
    if (!in1 || !in2)
    {
        cout << "can't open file";
        exit(-1);
    }

    int x, y, p = '0';
    in1 >> x;
    in2 >> y;
    while (in1.peek() != EOF && in2.peek() != EOF)
    {
        if (in1.peek() != EOF && in2.peek() != EOF)
        {
            if (x == y)
            {
                in1 >> x;
                in2 >> y;
                p = x;
            }
            else
            {
                if (x < y&&x != p&&y != p)
                {
                    out << x << " ";
                    in1 >> x;
                }
                if (x > y&&x != p&&y != p)
                {
                    out << y << " ";
                    in2 >> y;
                }
                if (x == p) in1 >> x;
                if (y == p) in2 >> y;
            }
        }
        else
        {
            if (in1.peek() == EOF)
            {
                if (x == y)
                {
                    in1 >> x;
                    in2 >> y;
                    p = x;
                }
                while (in2.peek() != EOF && y < x)
                {
                    if (x != y&&y != p)
                        out << y << " ";
                    in2 >> y;
                }
                if (y < x&&x != p&&y != p)
                {
                    out << y << " " << x << " ";
                }
                if (y > x&&x != p&&y != p)
                {
                    out << x << " " << y << " ";
                }
                while (in2.peek() != EOF)
                {
                    in2 >> y;
                    if (y != p)
                        out << y << " ";
                }
                if (y == p) in2 >> y;
            }
            else
            {
                if (x == y)
                {
                    in1 >> x;
                    in2 >> y;
                    p = x;
                }
                while (in1.peek() != EOF && x < y)
                {

                    if (x != p)
                        out << x << " ";
                    in1 >> x;
                }
                if (y < x&&x != p&&y != p)
                {
                    out << y << " " << x << " ";
                }
                if (y < x&&x != p&&y != p)
                {
                    out << x << " " << y << " ";
                }
                while (in1.peek() != EOF)
                {
                    {
                        in1 >> x;
                        if (x != p)
                            out << x << " ";
                    }
                }
            }
        }
    }
    return 0;
}