ExtractEmails

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ExtractEmail {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);



        String regex="\\s[A-Za-z][\\w.-]*@[A-Za-z-]+(\\.[A-Za-z]+)+";
        String input=scanner.nextLine();
        Pattern pattern=Pattern.compile(regex);

        Matcher matcher=pattern.matcher(input);

        while (matcher.find()){
            System.out.println(matcher.group(0).trim());
        }
    }
}