using System;
using System.Linq;
using System.Text.RegularExpressions;

namespace P02.FancyBarcodes
{
    internal class FancyBarcodes
    {
        static void Main(string[] args)
        {
            string barcodePattern = @"^@#+([A-Z][A-Za-z0-9]{4,}[A-z])@#+$";

            int countOfBarcodes = int.Parse(Console.ReadLine());

            for (int i = 0; i < countOfBarcodes; i++)
            {
                string barcode = Console.ReadLine();

                Match match = Regex.Match(barcode, barcodePattern);

                if (match.Success)
                {
                    if (match.Value.Any(s => char.IsDigit(s)))
                    {
                        string productGroup = string.Join("", match.Value.Where(s => char.IsDigit(s)));

                        Console.WriteLine($"Product group: {productGroup}");
                    }
                    else
                    {
                        Console.WriteLine("Product group: 00");
                    }
                }
                else
                {
                    Console.WriteLine("Invalid barcode");
                }
            }
        }
    }
}