#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  string S;
  cin >> S;
  int l = S.length();
  if (S[l - 1] == '1' || S[l - 1] == '0' || S[l - 1] == '6' || S[l - 1] == '8')
    cout << "pon";
  else if (S[l - 1] == '2' || S[l - 1] == '4' || S[l - 1] == '5' ||
           S[l - 1] == '7' || S[l - 1] == '9')
    cout << "hon";
  else
    cout << "bon";
}
