#include<bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  
  
  int a= N%10;
  if (a==2 || a==4 || a==5 || a==7 || a==9)cout << "pon" endl;
  else if (a==0||a==1||a==6||a==8)cout << "hon" << endl;
  else cout << "bon" << endl;
}
