package com.company;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Created by Gosho PC on 17.6.2016 г..
 */
public class ExtractEmails {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        String text = reader.readLine();

        Pattern pattern = Pattern.compile("([A-Za-z0-9]+(?:[-._][A-Za-z0-9]+)*@(?:[A-Za-z]+\\-?[A-Za-z]+\\.)+[A-Za-z]+\\-?[A-Za-z]+)\\b");
        Matcher matcher = pattern.matcher(text);

        while(matcher.find()) {
            System.out.println(matcher.group());
        }
    }
}