package com.javarush.task.task19.task1908;

/*
Выделяем числа
*/

import java.io.*;

public class Solution {
    public static void main(String[] args) throws IOException,NumberFormatException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        BufferedReader fr = new BufferedReader(new FileReader(reader.readLine()));
        BufferedWriter fw = new BufferedWriter(new FileWriter(reader.readLine()));

        String str = "";

        while(fr.ready())
        {

            int read = fr.read();
            str += (char) read;

        }
        String[]strM = str.split("\\W");

        for(String s : strM)
        {
            try
            {
                Integer.parseInt( s );

                fw.write(s + " ");
            }
            catch( Exception ex)
            {
            }
        }

        reader.close();
        fr.close();
        fw.close();
    }
}