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

namespace _03._Inbox_Manager
{
    class Program
    {
        static void Main(string[] args)
        {
            var emails = new Dictionary<string, List<string>>();

            string cmd = Console.ReadLine();

            while (cmd != "Statistics")
            {
                string[] cmdArgs = cmd.Split("->");
                string cmdT = cmdArgs[0];

                if (cmdT == "Add")
                {
                    string user = cmdArgs[1];
                    if (emails.ContainsKey(user))
                    {
                        Console.WriteLine($"{user} is already registered");
                    }
                    else
                    {
                        emails.Add(user, new List<string>());
                    }
                }

                else if (cmdT == "Send")
                {
                    string user = cmdArgs[1];
                    string mail = cmdArgs[2];
                    emails[user].Add(mail);

                }

                else if (cmdT == "Delete")
                {
                    string user = cmdArgs[1];
                    if (emails.ContainsKey(user))
                    {
                        emails.Remove(user);
                    }
                    else
                    {
                        Console.WriteLine($"{user} not found!");
                    }
                }

                cmd = Console.ReadLine();
            }
            Console.WriteLine($"Users count: {emails.Count}");

            foreach (var userMail in emails.OrderByDescending(mail => mail.Value.Count).ThenBy(name => name.Key))
            {
                Console.WriteLine(userMail.Key);

                Console.WriteLine(string.Join("\n - ", userMail.Value));
            }
        }


    }
}