using System;

namespace ABC168A
{
    class Program
    {
        static void Main(string[] args)
        {
            var N = Console.ReadLine();
            var ans = "";

            switch (N[^1])
            {
                case '2':
                case '4':
                case '5':
                case '7':
                case '9':
                    ans = "hon";
                    break;
                case '0':
                case '1':
                case '6':
                case '8':
                    ans = "pon";
                    break;
                case '3':
                        ans = "bon";
                    break;
                default:
                    break;
            }

            Console.WriteLine(ans);
        }
    }
}
