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