using System;
using System.Text.RegularExpressions;
using System.Collections.Generic;
using System.Linq;


namespace ConsoleApp18
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int countRegistrations = 0;
            for (int i = 0; i < n; i++)
            {
                string text = Console.ReadLine();
                string pattern = @"(U\$)([A-Z]{1}[a-z]{2,})\1(P@\$)([A-z]{5,}.*\d+)\3";
                Regex regex = new Regex(pattern);
                if (regex.IsMatch(text))
                {
                    Console.WriteLine("Registration was successful");
                    Match match = regex.Match(text);
                    Console.WriteLine($"Username: {match.Groups[2]}, Password: {match.Groups[4]}");
                    countRegistrations++;
                }
                else
                {
                    Console.WriteLine("Invalid username or password");
                }
            }
            Console.WriteLine($"Successful registrations: {countRegistrations}");
        }
    }
}