#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1000000007;
int main() {
  string N;
  cin >> N;
  string ans = "";
  N = N.back();
  if (N == "2" || N == "4" || N == "5" || N == "7" || N == "9") {
    ans = "hon";
  } else if (N == "0" || N == "1" || N == " 6" || N == " 8") {
    ans = "pon";
  } else {
    ans = "bon";
  }
  cout << ans << endl;
}
