using System;
 
class Ans{
  public static void Main(string[] args) {
    string n = Console.ReadLine();
    char n_last = n[-1];
    string str = "";
    switch(n_last) {
        case '2':
        case '4':
        case '5':
        case '7':
        case '9':
          str = "hon";
          break;
        case '0':
        case '1':
        case '6':
        case '8':
          str = "pon";
          break;
        case '3':
          str = "bon";
          break;
        default:
          break;
        }
		Console.WriteLine(str);
	}
}