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