Fancy Barcodes

import re

count_of_barcodes = int(input())

for value in range(count_of_barcodes):
    barcode = input()
    barcode_pattern = r'\@\#+([A-Z][A-Za-z0-9]{4,}[A-Z])\@\#+'
    is_valid = re.findall(barcode_pattern, barcode)

    if is_valid:
        barcode = ''.join(is_valid)
        product_group = ''.join([x for x in barcode if x.isdigit()])
        if not product_group:
            product_group = '00'
        print(f'Product group: {product_group}')
    else:
        print('Invalid barcode')