#include <bits/stdc++.h>
using namespace std;
int main() {
  string N;
  cin >> N;
  int a = N.size();
  char b = N.at(a - 1);
  if (b == 3) {
    cout << "bon" << endl;
  } else if (b == 0 or 1 or 6 or 8) {
    cout << "pon" << endl;
  } else {
    cout << "hon" << endl;
  }
}
