using System;
using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;
namespace _02._Registration
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            Regex regex = new Regex(@"^U\$([A-Z][a-z]{3,})U\$P@\$([a-z]{5,}[0-9]*)P@\$$");
            int count = 0;
            for (int i = 0; i < n; i++)
            {
                string input = Console.ReadLine();
                Match match = regex.Match(input);

                if (match.Success)
                {
                    count++;
                    Console.WriteLine("Registration was successful");
                    Console.WriteLine($"Username: {match.Groups[1].Value}, Password: {match.Groups[2].Value}");
                }
                else
                {
                    Console.WriteLine("Invalid username or password");
                }
            }
            Console.WriteLine($"Successful registrations: {count}");

        }
    }
}