NightLife

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication7
{
    class Program
    {

        static void Main(string[] args)
        {
            Dictionary<string, SortedDictionary<string, List<string>>> cities = new Dictionary<string, SortedDictionary<string, List<string>>>();
            string input = Console.ReadLine();
            string[] inputData = input.Split(';');
            while (input != "END")
            {
                if (cities.ContainsKey(inputData[0]) == false)
                {
                    cities.Add(inputData[0], new SortedDictionary<string, List<string>>());
                    List<string> check = new List<string>();
                    cities[inputData[0]].Add(inputData[1], new List<string>());
                    cities[inputData[0]][inputData[1]].Add(inputData[2]);
                }
                else
                {
                    if (cities[inputData[0]].ContainsKey(inputData[1]) == false)
                    {
                        cities[inputData[0]].Add(inputData[1], new List<string>());
                        cities[inputData[0]][inputData[1]].Add(inputData[2]);
                    }
                    else
                    {
                        cities[inputData[0]][inputData[1]].Add(inputData[2]);
                    }
                }
                input = Console.ReadLine();
                inputData = input.Split(';');
            }

            foreach (var town in cities.Keys)
            {

                Console.WriteLine(town);
                foreach (var item in cities[town].Keys)
                {
                    Console.WriteLine("->{0}:{1}", item, string.Join(", ", string.Join(", ", cities[town][item])));
                }
            }
        }
    }
}