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


int main(){
  int n;
  cin >> n;
  if(n%10==3){
    cout << "bon" << endl;
  }else if(n%10==0 || n%10==1 || n%10==6 || n%10==8){
    cout << "pon" << endl;
  }else{
    cout << "hon" << endl;
  }
  return 0;
}
