package com.javarush.task.task18.task1825;

import java.io.*;
import java.util.Comparator;
import java.util.Set;
import java.util.TreeSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/*
Собираем файл
*/

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        Set<String> fileNameSet = new TreeSet<>();

        while (true) {
            String fileName = reader.readLine();
            if (fileName.equals("end")) {
                reader.close();
                break;
            }

            fileNameSet.add(fileName);
        }

        BufferedInputStream buffIn;
        BufferedOutputStream buffOut = new BufferedOutputStream(new FileOutputStream("D:\\Downloads\\Lion.avi.txt"));

        for (String fileName : fileNameSet) {
            buffIn = new BufferedInputStream(new FileInputStream(fileName));

            while (buffIn.available() > 0) {
                buffOut.write(buffIn.read());
            }

            buffIn.close();
        }

        buffOut.close();
    }
}