#include <bits/stdc++.h>
using namespace std;

int main(){
  cin >> N
    if (N%10=2||N%10=4||N%10=5||N%10=7||N%10=9){
      cout << "hon" << endl;
    }
  	if (N%10=0||N%10=1||N%10=6||N%10=8){
      cout << "pon" << endl;
    }
  	if (N%10=3){
      cout << "bon" << endl;
    }
}