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


namespace V_Logger
{
    public class Program
    {
        static void Main(string[] args)
        {
            HashSet<Vlogger> vloggers = new HashSet<Vlogger>();
            var input = Console.ReadLine().Split(" ").ToArray();

            while (input[0] != "Statistics")
            {
                switch(input[1])
                {
                    case "joined":
                        Vlogger newVlogger = new Vlogger(input[0]);

                        vloggers.Add(newVlogger);

                    break;

                    case "followed":
                        //Sofrona followed EmilConrad
                        var following = input[0]; //Sofrona
                        var followed = input[2];
                        if (followed != following)
                        {
                            Vlogger vlogger1 = vloggers.Where(v => v.Name == following).FirstOrDefault();
                            Vlogger vlogger2 = vloggers.Where(v => v.Name == followed).FirstOrDefault();
                            vlogger1.AddFollowing(followed);
                            vlogger2.AddFollower(following);
                        }
                    break;

                }
                input = Console.ReadLine().Split(" ").ToArray();
            }
            int maxFollowers = int.MinValue;

            foreach(var item in vloggers)
            {
                if (item.Followers.Count > maxFollowers)
                {
                    maxFollowers = item.Followers.Count;
                }
            }
            Vlogger famous = vloggers.Where(v => v.Followers.Count == maxFollowers).FirstOrDefault();

            Console.WriteLine($"{famous.Name} : {famous.Followers.Count} followers, {famous.Following.Count} following");

            foreach(var follower in famous.Followers)
            {
                Console.WriteLine($" {follower}");
            }
        }
    }
    public class Vlogger
    {
        public string Name { get; set; }
        public SortedSet<string> Followers { get; set; }
        public HashSet<string> Following { get; set; }

        public Vlogger(string name)
        {
            this.Name = Name;
            this.Followers = new SortedSet<string>();
            this.Following = new HashSet<string>();
        }

        public void AddFollower (string name)
        {
            this.Followers.Add(name);
        }

        public void AddFollowing (string name)
        {
            this.Following.Add(name);
        }
    }
}