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