iiiiiii         iiiiiii   
   i1111iii       ii111t1i   
   i1fffti;;     ;i1ffftii   
   ii1fffti;;   ;i1ffftiii   
    i;1fffti;; ;;1ffftiii    
     ;;itffti;;;1fff1;;i     
      ;:itffti;1tft1;;;      
       ;iitttt1ttti;;        
        ;;itttttti;;         
         ;;;tttti:;          
          ;;1ttt;;           
           :1tt1;            
           :1tt1;            
           :1111:            
           :1111:            
           :;;;;:            
           ::::::