oo    o  ooooooo  oooooo   oo    o  oo    o  ooooooo  
 oo  o     oo     oo    o  oo    o  oo  oo   oo       
  ooo      oo     oo    o  oo    o  oooo     oo       
   o       oo     oooooo   ooooooo  oo       oooo     
  ooo      oo     oo  o    oo    o  oooo     oo       
 oo  o     oo     oo   o   oo    o  oo  oo   oo       
oo    o  ooooooo  oo    o  oo    o  oo    o  ooooooo