#include <bits/stdc++.h>
using namespace std;
const long long INF = 1000000007;
const long long mod = 1000000007;
int main() {
  string n;
  cin >> n;
  reverse(n.begin(), n.end());
  switch (n[0]) {
    case '1':
    case '0':
    case '6':
    case '8':
      cout << 'pon' << endl;
      break;
    case '2':
    case '4':
    case '5':
    case '7':
    case '9':
      cout << 'hon' << endl;
      break;
    case '3':
      cout << 'bon' << endl;
      break;
  }
  return 0;
}
