User_Logs

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

namespace User_Logs
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            Dictionary<string, Dictionary<string, int>> usersInfo = new Dictionary<string, Dictionary<string, int>>();
            while (input !="end")
            {
                var ip = input.Split(new char[] {' ','='}, StringSplitOptions.RemoveEmptyEntries).Skip(1).Take(1).ToList();
                var userName = input.Split(new char[] { ' ', '=' }, StringSplitOptions.RemoveEmptyEntries).TakeLast(1).ToList();
                //
                if (!usersInfo.ContainsKey(userName[0]))
                {
                    Dictionary<string, int> current = new Dictionary<string, int>();
                    current.Add(ip[0], 0);
                    usersInfo.Add(userName[0], current );
                }
                if (!usersInfo[userName[0]].ContainsKey(ip[0]))
                {
                    usersInfo[userName[0]].Add(ip[0], 0);
                }

                usersInfo[userName[0]][ip[0]]++;

                input = Console.ReadLine();
            }
            foreach (var item in usersInfo.OrderBy(x => x.Key))
            {
                Console.WriteLine(item.Key+":");
                var count = item.Value.Count;
                foreach (var personalData in item.Value)
                {
                    count--;
                    if (count>0)
                    {
                        Console.Write(personalData.Key + " => " + personalData.Value + ", ");
                    }
                    else
                    {

                        Console.Write(personalData.Key + " => " + personalData.Value + ".");
                    }
                }
                Console.WriteLine();



            }
        }
    }
}