#include <bits/stdc++.h>
using namespace std;
void Solve() {
  string s;
  cin >> s;
  if (s[0] == '2' || s[0] == '4' || s[0] == '5' || s[0] == '7' || s[0] == '9')
    cout << "hon\n";
  if (s[0] == '0' || s[0] == '1' || s[0] == '6' || s[0] == '8')
    cout << "pon\n";
  else
    cout << "bon\n";
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int T = 1;
  while (T--) {
    Solve();
  }
}
