package com.scalefocus;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
	// write your code here

        Scanner sc = new Scanner(System.in);
        int personAge = Integer.parseInt(sc.nextLine());
        String person = "";

        if (personAge >= 0 && personAge <= 2) {
            person = "baby";
        } else if (personAge >= 3 && personAge <= 13) {
            person = "child";
        } else if (personAge >= 14 && personAge <= 19) {
            person = "teenager";
        } else if (personAge >= 20 && personAge <= 65) {
            person = "adult";
        } else if (personAge >= 66) {
            person = "elder";
        } else {
            System.out.println("ERROR");
        }

        System.out.println(person);
    }
}