RainAir

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

namespace RainAir
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            string input = Console.ReadLine();

            Dictionary<string, List<int>> data = new Dictionary<string, List<int>>();

            while (input != "I believe I can fly!")
            {
                if (!input.Contains("="))
                {
                    string[] tokens = input.Split(new [] { ' ' }, 2);
                    string customerName = tokens[0];
                    string flights = tokens[1];
                    List<int> customerFlights = flights.Split(' ').Select(int.Parse).ToList();

                    if (!data.ContainsKey(customerName))
                    {
                        data.Add(customerName, new List<int>());
                    }
                    data[customerName].AddRange(customerFlights);
                }
                else
                {
                    string[] tokens = input.Split(new string[] {" = "},StringSplitOptions.RemoveEmptyEntries);
                    string customerName = tokens[0];
                    string secondname = tokens[1];

                    if (!data.ContainsKey(customerName))
                    {
                        data.Add(customerName, new List<int>());
                    }
                    if (data.ContainsKey(customerName) && data.ContainsKey(secondname))
                    {
                        data[customerName] = new List<int>(data[secondname]);
                    }
                }
                input = Console.ReadLine();
            }
            foreach (var entry in data
                     .OrderByDescending(x => x.Value.Count())
                     .ThenBy(x => x.Key))
            {
                Console.WriteLine("#{0} ::: {1}", entry.Key, string.Join(", ", entry.Value.OrderBy(x => x)));
            }
        }
    }
}