using System;

public class Program

{

    public static void Main()

    {

        // baby child teenager adult elder

        //0-2 3-13 14-19 20-65 66

        int age = int.Parse(Console.ReadLine());

        if (age >= 0 && age <= 2)

        {

        Console.WriteLine("baby");

        }

        else if (age >= 3 && age <= 13)

        {

         Console.WriteLine("child");

        }

        else if (age >= 14 && age <= 19)

        {

         Console.WriteLine("teenager");

        }

        else if (age >= 20 && age <= 65)

        {

        Console.WriteLine("adult");

        }

        else if (age >= 66)

        {

        Console.WriteLine("elder");

        }

    }

}