import java.util.Scanner;

public class exam {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String code = "";
        int n = Integer.parseInt(scanner.nextLine());

        for(int i = 0 ;i < n; i++) {
            code ="";
            String barcode = scanner.nextLine();

            char firstSymbol = barcode.charAt(0);

            if(firstSymbol != '@') {
                System.out.println("Invalid barcode");
                continue;
            }

            char secondSymbol = barcode.charAt(1);

            if(secondSymbol != '#') {
                System.out.println("Invalid barcode");
                continue;
            }

            String newWord = barcode.replace("@", "");
            newWord = newWord.replace("#", "");
            newWord = newWord.replace(" ", "");

            char firstLetter = newWord.charAt(0);

            if(Character.isLowerCase(firstLetter)) {
                System.out.println("Invalid barcode");
                continue;
            }

            boolean isStupid = true;
            for(int j= 0; j < newWord.length(); j++) {
                if(!Character.isLetterOrDigit((newWord.charAt(j)))) {
                    System.out.println("Invalid barcode");
                    isStupid = false;
                }
            }

            if(isStupid == false) {
                continue;
            }

            char lastLetter = newWord.charAt(newWord.length() - 1);

            if(Character.isLowerCase(lastLetter)) {
                System.out.println("Invalid barcode");
                continue;
            }

            for(int k = 0; k < newWord.length(); k++) {

                if(Character.isDigit(newWord.charAt(k))) {
                    code += newWord.charAt(k);
                }
            }

            if(code.isEmpty()) {
                code = "00";
            }

            System.out.printf("Product group: %s%n", code);
        }
    }
}