using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KariAji
{
    public class Ember{
    public String név;
    public HashSet<String> gifts=new HashSet<String>();

    public Ember(String név) {
        this.név = név;
    }

   public override string ToString()
{
       return név+": ";
}
    public override bool Equals(object obj)
{
            Ember e=(Ember)obj;
        return e.név.Equals(név);

}
    public override int GetHashCode()
    {
        return 0;
    }


}
    class Program
    {
        static void Main(string[] args)
        {
            Console.OutputEncoding=Encoding.UTF8;
            String sor=Console.ReadLine();
        List<String> sorok=new List<String>();
        HashSet<Ember> emberek=new HashSet<Ember>();
        while(sor!=null){
            String[] token=sor.Split(':');
            String[] nyilas=token[1].Split(';');
            foreach(String s2 in nyilas){
                String[] csomag=s2.Split(new String[]{"->"},StringSplitOptions.None);
                emberek.Add(new Ember(csomag[1]));
            }

            sorok.Add(sor);

            sor=Console.ReadLine();
        }
        foreach(String s in sorok){
            String[] token=s.Split(':');
            String[] nyilas=token[1].Split(';');
            foreach(String s2 in nyilas){
                String[] csomag=s2.Split(new String[]{"->"},StringSplitOptions.None);
                foreach(Ember e in emberek){
                    if(e.név.Equals(csomag[1])){
                        e.gifts.Add(csomag[0]);
                    }
                }
            }
        }
        int max=-1;
        foreach(Ember e in emberek){
            if(max<e.gifts.Count)
                max=e.gifts.Count;
        }

            var sorted=emberek.OrderBy(x=>x.név);
        foreach(Ember e in sorted){
            if(e.gifts.Count==max){
            Console.Write(e);
            String[] sortedG=e.gifts.ToArray();
            Array.Sort(sortedG);
            for(int i=0;i< sortedG.Length;i++){
                Console.Write(sortedG[i]);
                if(i!=sortedG.Length-1)
                    Console.Write(", ");
            }
            Console.WriteLine();
            }
        }
        }
    }
}