using System;

public class Program

{

    public static void Main()

    {

        string[] usernames = Console.ReadLine()

            .Split('|');

        foreach (string username in usernames)

        {

            if (username.Length > 3 && username.Length <= 16)

            {

                bool isUsernameValid = true;

                foreach (char ch in username)

                {

                    if (!(char.IsLetterOrDigit(ch) || ch == '-' || ch == '_'))

                    {

                        isUsernameValid = false;

                        break;

                    }

                }

                if (isUsernameValid)

                {

                    Console.WriteLine(username);

                }

            }

        }

    }

}