#include <bits/stdc++.h>
using namespace std;
const int INF = 1001001001;
using P = pair<int, int>;
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  if (n / 10 == 2 || n / 10 == 4 || n / 10 == 5 || n / 10 == 7 || n / 10 == 9) {
    cout << "hon" << endl;
  } else if (n / 10 == 0 || n / 10 == 1 || n / 10 == 6 || n / 10 == 8) {
    cout << "pon" << endl;
  } else {
    cout << "bon" << endl;
  }
  return 0;
}
