Phoenix_Oscar_Romeo_November_Dynamic/91.67

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

namespace Problem_4_CODE_Phoenix_Oscar_Romeo_November
{
    class Program
    {
        static void Main()
        {
            Dictionary<string, List<string>> squads = new Dictionary<string, List<string>>();

            string[] input = Console.ReadLine().Split(" -> ");
            string creature = input[0];
            string squadMate = input[1];
            while (creature != "Blaze it!")
            {
                squadMate = input[1];

                if (creature != squadMate)
                {
                    if (!squads.ContainsKey(creature))
                    {
                        squads[creature] = new List<string>();
                        squads[creature].Add(squadMate);
                    }
                    else
                        if (!squads[creature].Contains(squadMate))
                        squads[creature].Add(squadMate);
                }

                if (squads.ContainsKey(squadMate) && squads[creature].Contains(squadMate) && squads[squadMate].Contains(creature))
                {
                    squads[creature].Remove(squadMate);
                    squads[squadMate].Remove(creature);
                }

                input = Console.ReadLine().Split(" -> ");
                creature = input[0];
            }
            foreach (var item in squads.OrderByDescending(x => x.Value.Count))
                Console.WriteLine(item.Key + " : " + item.Value.Count);
        }
    }
}