using System;
using System.Collections.Generic;

public class Program
{
	public static void Main()
	{
		Console.WriteLine("Hello World");

		var userEntries = new Dictionary<string,string>();

		var line = Console.ReadLine();

		var count = 0;

		while(line != "login")
		{
			var input=line.Split();
			var username = input [0];
			var password = input [input.Length - 1];
			userEntries[username] = password;

			line = Console.ReadLine();

		}

		line = Console.ReadLine();

		while(line != "end")
		{
			var input=line.Split();
			var logInUsername = input [0];
			var logInPassword = input [input.Length - 1];

			if (!userEntries.ContainsKey(logInUsername) || !userEntries.ContainsValue(logInPassword))
			{
				Console.WriteLine("{0}: login failed",logInUsername);
				count ++;
			}

			else

			{
				Console.WriteLine("{0}: logged in successfully",logInUsername);
			}

			line = Console.ReadLine();
		}

			Console.WriteLine("unsuccessful login attempts: {0}",count);

	}
}