using System;
using System.Text.RegularExpressions;

namespace _02._Registration
{
    class Program
    {
        static void Main(string[] args)
        {
            Regex regex = new Regex(@"^([U$].)([A-Z][a-z]+)(\1)([P@$]..)([A-z]{5,}[0-9]+)(\4)");

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

            int count = 0;

            for (int i = 0; i < numberOfInputs; i++)
            {
                string input = Console.ReadLine();

                Match match = regex.Match(input);

                if (!match.Success)
                {
                    Console.WriteLine("Invalid username or password");
                }
                else if (match.Success)
                {
                    string username = match.Groups[2].Value;
                    string password = match.Groups[5].Value;

                    count++;

                    Console.WriteLine("Registration was successful");
                    Console.WriteLine($"Username: {username}, Password: {password}");
                }
            }

            Console.WriteLine($"Successful registrations: {count}");
        }
    }
}