#include <bits/stdc++.h>
using namespace std;
using P = pair<long long, long long>;
const long long INF = long long(1e18) + 1;
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  long long N;
  cin >> N;
  N %= 10;
  if (N == 2 || N == 5 || N == 5 || N == 7 || N == 9) {
    cout << "hon";
  } else if (N == 0 || N == 1 || N == 6 || N == 8) {
    cout << "pon";
  } else {
    cout << "bon";
  }
}
