using System;

public enum agegroup

{adult,earlyteen,lateteen,children,infancy

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine("please a number a");

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

        if(age>=18)

        Console.WriteLine( agegroup.adult);

        else if(age>=15)

            Console.WriteLine( agegroup.earlyteen);

        else if(age>=12)

        Console.WriteLine( agegroup.lateteen);

        else if (age>=7)    

        Console.WriteLine( agegroup.children);

        else if(age>=3) 

        Console.WriteLine( agegroup.infancy);

    }

}