#include <bits/stdc++.h>
using namespace std;
int main{
  	string s;
	cin << s;
  	if(s[s.length()-1] == '2' || s[s.length()-1] == '4' || s[s.length()-1] == '5' ||s[s.length()-1] == '7' || s[s.length()-1] == '9'){
    	cout << "hon" << endl;
    }else if(s[s.length()-1] == '3'){
		cout << "bon" << endl;
    }else{
    	cout << "pon" << endl;
    }
}