import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

public class demo {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String regexEmail = "(([a-zA-Z0-9]+)([\\.\\-_]?)([a-zA-Z0-9]+))(@)([a-zA-z]+.[a-zA-z]+[\\.\\-_]?([a-zA-Z0-9]+))";
        Pattern pattern = Pattern.compile(regexEmail);
        String input = scanner.nextLine();

        Matcher matcher = pattern.matcher(input);

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





    }
}