#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  if (s[0] == '2' || s[0] == '4' || s[0] == '5' || s[0] == '7' || s[0] == '9') {
    cout << "hon\n";
  } else if (s[0] == '1' || s[0] == '1' || s[0] == '6' || s[0] == '8') {
    cout << "pon\n";
  } else if (s[0] == '3') {
    cout << "bon\n";
  }
  return 0;
}
