Prog. Fundam. Exam-09.July.17 Part1 - 04. Pokemon Evolution

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace _12._ExamPreparation1
{
    class ExamPreparation1
    {
      static void Main(string[] args)
        {
            string input = Console.ReadLine();
            Dictionary<string, Dictionary<string, List<int>>> pokemonNames = new Dictionary<string, Dictionary<string, List<int>>>();

            while (input != "wubbalubbadubdub")
            {
                string pattern = @"(?<pokemon>[A-Za-z]+)( -> )(?<evolution>[A-Za-z]+)( -> )(?<index>\d+)";
                MatchCollection matches = Regex.Matches(input, pattern);
                foreach (Match item in matches)
                {
                    if (!pokemonNames.ContainsKey(item.Groups["pokemon"].ToString()))
                    {
                        Dictionary<string, List<int>> current = new Dictionary<string, List<int>>();
                        current.Add(item.Groups["evolution"].ToString(), new List<int>());
                        current[item.Groups["evolution"].ToString()].Add(int.Parse(item.Groups["index"].ToString()));
                        pokemonNames.Add(item.Groups["pokemon"].ToString(), current);
                    }
                    else
                    {
                        if (!pokemonNames[item.Groups["pokemon"].ToString()].ContainsKey(item.Groups["evolution"].ToString()))
                        {
                            Dictionary<string, List<int>> current = new Dictionary<string, List<int>>();
                            pokemonNames[item.Groups["pokemon"].ToString()].Add(item.Groups["evolution"].ToString(), new List<int> { int.Parse(item.Groups["index"].ToString()) });
                        }
                        else
                        {
                            pokemonNames[item.Groups["pokemon"].ToString()][item.Groups["evolution"].ToString()].Add(int.Parse(item.Groups["index"].ToString()));
                        }
                    }
                }
                input = Console.ReadLine();
            }
            foreach (var pokemon in pokemonNames)
            {
                Console.WriteLine($"# {pokemon.Key}");
                foreach (var evolution in pokemon.Value)
                {
                    Console.Write($"{evolution.Key} <-> ");
                    foreach (var item in evolution.Value)
                    {
                        Console.WriteLine(item);
                    }
                }
            }
        }
    }
}