import java.io.*;
import java.util.*;

/*
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/**
 *
 * @author 232-1
 */
public class MainClass {
    public static void main(String[] args) throws FileNotFoundException, IOException {
       List<String> L = new ArrayList<>();

       Collection<Object> C = new ArrayList<>();
       L.add("TEST1");
       L.add("TEST2");
       C.add("TEST");
       C.add(123);
       File file = new File("D:\\232-1\\fis1.txt");

        BufferedReader br = new BufferedReader(new FileReader(file));

        String st;
        List<String>  words = new ArrayList<>();
        while ((st = br.readLine()) != null)
            words.addAll(Arrays.asList(st.split(" ")));
        Set<String> S = new HashSet<>(words);
        for(String listElem: S)
            System.out.println(listElem);
    }
}