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

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

        int n = Integer.parseInt(reader.readLine());

        for (int i = 0; i < n; i++) {
            String input = reader.readLine();
            String regex = "@[#]+[A-Za-z0-9]+@[#]+";
            Pattern pattern = Pattern.compile(regex);
            Matcher matcher = pattern.matcher(input);
            if (matcher.find()) {
                List<String> list = new ArrayList<>();
                String asd = matcher.group();
                for (int j = 0; j < asd.length(); j++) {
                    if (Character.isDigit(asd.charAt(j))) {
                        list.add(Character.toString(asd.charAt(j)));
                    }
                }
                String group = "";
                if (list.isEmpty()) {
                    group = "00";
                } else {
                    group = String.join("", list);
                }
                System.out.println("Product group: " + group);
            } else {
                System.out.println("Invalid barcode");
            }
        }

    }
}