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

int main ()
{
    string s;
    cin >> s;
	char c = s[s.size()-1];
    if(c == '2' || c == '4' || c == '5' || c == '7' || c == '9'){
      cout << "hon" << '\n';
    }
  	else if(c == '0' || c == '1' || c == '6' || c == '8'){
      cout << "pon"  << '\n';
    }
  	else{
      cout << "bon"  << '\n';
    }
  	return 0
}
