package file;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;

public class File {

    public static void main(String[] args)throws IOException {
        BufferedReader be = new BufferedReader(new FileReader("command.txt"));
        HashSet<String> adat = new HashSet<String>();
        String sor;
        while ((sor=be.readLine())!=null) {
            adat.add(sor);
        }
        be.close();
        FileWriter ki = new FileWriter("output.txt");
            for (String kiline : adat) {
                ki.write(kiline);
            }

}
}