ForceBook

using System;
using System.Collections.Generic;
using System.Linq;
namespace ForceBook
{
    class Program
    {
        static void Main(string[] args)
        {
            string command = string.Empty;
            var users = new Dictionary<string, List<string>>();
            while ((command = Console.ReadLine()) != "Lumpawaroo")
            {
                if (command.Contains('|'))
                {
                    var tokens = command.Split(" | ");
                    var side = tokens[0];
                    var user = tokens[1];
                    if (!users.ContainsKey(side))
                    {
                        users.Add(side, new List<string>());
                    }
                    if (users.ContainsKey(side) && !users[side].Contains(user))
                    {
                        users[side].Add(user);
                    }
                }
                else
                {
                    var tokens = command.Split(" -> ");
                    var side = tokens[1];
                    var user = tokens[0];
                    foreach (var kvp in users)
                    {
                        if (kvp.Value.Contains(user))
                        {
                            kvp.Value.Remove(user);
                            break;

                        }
                    }

                    if (!users.ContainsKey(side))
                    {
                        users.Add(side, new List<string>());
                    }
                    users[side].Add(user);
                    Console.WriteLine($"{user} joins the {side} side!");


                }
            }
            foreach (var kvp in users.Where(x => x.Value.Count > 0).OrderByDescending(x => x.Value.Count).ThenBy(x => x.Key))
            {
                Console.WriteLine($"Side: {kvp.Key}, Members: {kvp.Value.Count()}");
                foreach (var user in kvp.Value.OrderBy(x => x))
                {
                    Console.WriteLine($"! {user}");
                }
            }
        }
    }
}