using System;

public class Program

{

    public static void Main()

    {

        //login1,Shtisa4,sdIJsd2,sdIII234,KKSJS982

        string namesLine = Console.ReadLine();

        string[] usernames = namesLine.Split(',');

        foreach (var username in usernames)

        {

            Console.WriteLine(String.Format("{0}", username.ToLower()));

        }

    }

}