#include <bits/stdc++.h.
using namespace std;
int main(){
  string s;
  cin >> s;
  char c = s[s.size()-1];
  if(c == '2' || c == '4' || c == '5' || c == '7' || c == '9') cout << "hon\n";
  else if(c == '3') cout << "bon\n";
  else cout << "pon\n";
}