XX:::...::iR    
   .R:       R;    
    Y;      .R     
   ;R.       YI    
  tR.         iR.  
.RBttttttttttttRB; 
VI; .;;;;;;;;;;;=B.
RMR RMMMMMMMMMMMMB;
XMY BMMMMMMMMMMMMY;
R:. :::::::::::::;;
XYi ;ttttttttttttR;
I;               V:
I;               R 
;I              ;Y 
 R.             =t 
 Y;             V; 
 it            :R  
  R:           =I  
  ti           R:  
  .R:         ;X   
   iV.       :B:   
    :=;:...:;=.