using System.Collections.Generic;
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")
else if (g[i]=="silviya"|| g[i]=="mariya"|| g[i]=="nikol")
else{tomovaList.Add(g[i]);}
Console.WriteLine(string.Join(",",stoychevList));
Console.WriteLine(string.Join(",",dikovList));
Console.WriteLine(string.Join(",",tomovaList));