#include <iostream>
using namespace std;

int main() {
	int s; cin >> s;
  	switch(s % 10) {
      case 0: case 1: case 6: case 8: cout << "pon"; break;
      case 2: case 4: case 5: case 7: case 9: cout << "hon"; break;
      case 3: cout << "bon"; break;
      default:
    }
  	return 0;
}