#include <bits/stdc++.h>
using namespace std;
int main() {
  int N;
  do {
    cin >> N;
  } while (N > 999 || N < 0);
  int n;
  n = N % 10;
  if (n == 2 || n == 4 || n == 5 == 7 == 9) {
    cout << "hon";
  } else if (n == 3) {
    cout << "bon";
  } else {
    cout << "pon";
  }
}
