▒▒▒    
  ▒▒▒·▒▒▒  
 ▒▒·····▒▒ 
 ▒·······▒ 
 ▒·······▒ 
 ▒Z·····Z▒ 
  ▒·····▒  
    ▒Z▒    
    ▒'▒    
  ▒▒▒·▒▒▒  
 ▒▒·····▒▒ 
 ▒·······▒ 
▒▒···∩···▒▒
╬···∩∩∩···╬
▒▒···∩···▒▒
 ▒·······▒ 
 ▒▒·····▒▒ 
  ▒▒▒·▒▒▒  
    ▒╬▒