second

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

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

        int n = Integer.parseInt(scanner.nextLine());

        Pattern pattern = Pattern.compile("[@][#]+([A-Z][A-Za-z0-9]{4,}[A-Z])[@][#]+");

        while (n-- > 0) {

            String input = scanner.nextLine();

            Matcher matcher = pattern.matcher(input);

            if (matcher.find()) {

                String product = matcher.group(1);
                StringBuilder code = new StringBuilder();

                for (int i = 0; i < product.length(); i++) {
                    char symbol = product.charAt(i);
                    if (Character.isDigit(symbol)) {
                        code.append(symbol);
                    }
                }

                if (code.length() > 0) {
                    System.out.println(String.format("Product group: %s", code.toString()));
                } else if (code.length() == 0) {
                    System.out.println("Product group: 00");
                }

            } else {
                System.out.println("Invalid barcode");
            }
        }
    }
}