using System;

using System.Linq;  

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        string [] g = Console.ReadLine().Split(',').ToArray();

        List<string> stoychevList = new List<string>();

        List<string> dikovList = new List<string>();

        List<string> tomovaList = new List<string>();

​

​

        for(int i=0; i<g.Length; i++)

        {

        if(g[i]=="grigor"|| g[i]=="georgi"|| g[i]=="denis")

        {

        stoychevList.Add(g[i]);

        }

            else if (g[i]=="silviya"|| g[i]=="mariya"|| g[i]=="nikol")

            {dikovList.Add(g[i]);}

        else{tomovaList.Add(g[i]);}

        }

        Console.WriteLine(string.Join(",",stoychevList));

        Console.WriteLine(string.Join(",",dikovList));

        Console.WriteLine(string.Join(",",tomovaList));

​

​

    }

}