import java.io.*;
import java.util.ArrayList;
import java.util.List;

public class MyScanner {
    private BufferedReader br;
    private String lastLine;
    private List<String> lastWords;
    private int pos;

    public MyScanner(InputStream s) {
        br = new BufferedReader(new InputStreamReader(s));
        init();
    }
    public MyScanner(String s) {
        br = new BufferedReader(new StringReader(s));
        init();
    }
    public MyScanner(File f) {
        try {
            br = new BufferedReader(new FileReader(f));
            init();
        } catch (FileNotFoundException e) {
            System.out.println("File does not exist" + e.getMessage());
        }
    }

    private void init() {
        lastWords = new ArrayList<>();
        pos = 0;
    }

    public boolean hasNextLine() {
        try {
            lastLine = br.readLine();
        } catch (IOException e) {
            System.out.println("Error");
        } finally {
            return lastLine != null;
        }
    }
    public String nextLine() {
        return lastLine;
    }
    public boolean hasNextWord() {
        if(pos == lastWords.size()) {
            if(hasNextLine()) {
                lastWords = splitWords(nextLine());
                pos = 0;
            }
        }
        return pos < lastWords.size();
    }
    public String nextWord() {
        String ret = lastWords.get(pos);
        pos++;
        return ret;
    }

    private static List<String> splitWords(String s) {
        final String DASH = "\u2E40-֊־᐀᠆‐‑‒–—―⸗⸚⸺⸻〜〰゠︱︲﹘﹣－'";

        List<String> list = new ArrayList<>();
        int left = 0;
        for (int i = 0; i < s.length(); ++i) {
            char sym = s.charAt(i);
            if (!Character.isLetter(sym) && DASH.indexOf(sym) == -1) {
                if (left < i) {
                    list.add(s.substring(left, i));
                }
                left = i + 1;
            }
        }

        if (left < s.length()) {
            list.add(s.substring(left, s.length()));
        }
        return list;
    }

    public void close() {
        try {
            br.close();
        } catch (IOException e) {
            System.out.println("Error");
        }
    }
}