6. * User Logs

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

public class Program
{
    public static void Main()
    {
        var line = Console.ReadLine().Split(' ');

        var users = new SortedDictionary<string, Dictionary<string, int>>();

        while (line[0] != "end")
        {
            var user = line[2].Split('=');
            var ip = line[0].Split('=');

            var userName = user[1];
            var ipAdress = ip[1];

            line = Console.ReadLine().Split(' ');

            InsertName(users, userName);
            InsertIP(users, userName, ipAdress);
        }

        foreach (var user in users)
        {
            Console.WriteLine($"{user.Key}:");
            Console.WriteLine(string.Join(", ", user.Value.Select(value => value.Key + " => " + value.Value).ToArray()) + ".");
        }
    }

    private static void InsertName(SortedDictionary<string, Dictionary<string, int>> users, string username)
    {
        if (!users.ContainsKey(username))
        {
            users[username] = new Dictionary<string, int>();
        }
    }

    private static void InsertIP(SortedDictionary<string, Dictionary<string, int>> users, string username, string ipAdress)
    {
        if (!users[username].ContainsKey(ipAdress))
        {
            users[username][ipAdress] = 0;
        }
        users[username][ipAdress] += 1;
    }
}