#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
using pll = pair<long long, long long>;
int main() {
  int n;
  cin >> n;
  int t = n % 10;
  if (t == 2 || t == 4 || t == 5 || t == 7 || t == 9) {
    cout << "hon" << endl;
  } else if (t == 0 || t == 1 || t == 6 || t == 8) {
    cout << "pon" << endl;
  } else {
    cout << "bon" << endl;
  }
}
