class Main
    {
        static void main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            string ans = "";
            switch(N % 10)
            {
                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;
                    
            }

            Console.WriteLine(ans);
        }
        
    }