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