using System;

namespace Ages
{
    class Program
    {
        static void Main(string[] args)
        {
            int age = int.Parse(Console.ReadLine());

            if (age <=2)
            {
                Console.WriteLine("baby");
            }

            if (age >=3 && age <=13)
            {
                Console.WriteLine("child");
            }

            if (age >= 14 && age <=19)
            {
                Console.WriteLine("teenager");
            }

            if (age >= 20 && age <= 65)
            {
                Console.WriteLine("adult");
            }

            if (age >=66)
            {
                Console.WriteLine("elder");
            }
        }
    }
}