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