int main ()
{
    string s;
    cin >> s;
	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'
    }
}