using System;
using System.Linq;

public class Program
{
    public static void Main(string[] args)
    {
        var input = args[0];
        switch (input.Last())
        {
            case '2':
            case '4':
            case '5':
            case '7':
            case '9':
                Console.WriteLine("hon");
                break;
            case '0':
            case '1':
            case '6':
            case '8':
                Console.WriteLine("pon");
                break;
            case '3':
                Console.WriteLine("bon");
                break;
            default:
                break;
        }
    }
}
