999
999
X+5Y+6  
X-6Y+6  
X+5Y-6  
X-6Y-6  
X+5Y+5  
X-6Y+6  
X+6Y-6  
X-6Y-6  
X+4Y+7  
X-4Y+7  
X+4Y-4  
X-4Y-4  
       474         
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           