#include <bits/stdc++.h>

using namespace std;

int main(){
	string n;
  	cin >> n;
  	int sz = n.size();
  	int bon,pon,hon;
  	bon,pon,hon = 0;
  	for(int i = 0; i<sz; i++){
    	if(n[i] == '2' ||n[i] == '4'||  n[i] == '5' || n[i] == '7' || n[i] == '9')
          hon++;
      	else if(n[i] == '0'|| n[i] == '1' || n[i] == '6' || n[i] == '8')
          pon++;
      	else
          bon++;
    }
  	if(hon>0)
      count << "hon"<<endl;
  	else if(pon > 0)
      cout << "pon\n";
  	else
      cout << "bon\n";
  
return 0;
}