#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1000000007;
const long long INF = 1061109567;
const double EPS = 1e-10;
int main() {
  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 == 9) {
    cout << "pon" << endl;
  } else {
    cout << "bon" << endl;
  }
  return 0;
}
