using System;
using System.Linq;
using System.Collections.Generic;

namespace citiesByContinentAndCountry
{
    class Program
    {
        static void Main(string[] args)
        {
            //  Dictionary<string, Dictionary<string, List<string>>> database = new Dictionary<string, Dictionary<string, List<string>>>();

            Dictionary<string, Countries> database = new Dictionary<string, Countries>();

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

            for (int i = 0; i < numberOfInputs; i++)
            {
                string[] currentInput = Console.ReadLine()
                    .Split(" ");

                string continent = currentInput[0];
                string county = currentInput[1];
                string city = currentInput[2];

                Countries currentCountry = new Countries(county, city);

                if (!database.ContainsKey(continent))
                {
                    database.Add(continent, currentCountry);
                }

                else if (database.ContainsKey(continent))
                {
                    if (!database[continent].Country.Contains(county))
                    {
                        database[continent]
                    }

                    if (database[continent].Country.Contains(county))
                    {
                        if (!database[continent].Country.Contains(city))
                        {
                            database[continent].Country.Insert(0, city);
                        }
                        else
                        {
                            database[continent].Cities.Add(city);
                        }
                    }
                }
            }
        }
    }

    class Countries
    {
        public Countries(string country, string city)
        {
            this.Country = country;
            this.Cities = new List<string>();
            Cities.Add(city);
        }
        public string Country { get; set; }
        public List<string> Cities { get; set; }
    }
}