#include<bits/stdc++.h>
using namespace std;
int main()
{
  ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
   int n;
  cin>>n;
  int d=n%10;
  if(d==3)
    cout<<"bon"<<"\n";
  else if(d==2||d==4||d==7||d==5||d==9)
    cout<<"hon"<<"\n";
  else
    cout<<"pon\n";
  return 0;
}