.....▒   ▒.....
._...8   8..._.
......▒ ▒......
......8 8......
...._..▒.._....
▒8...........8▒
  ▒8.......8▒  
    ▒..<..▒    
  ▒8...o...8▒  
▒8...........8▒
...._..▒.._....
......8 8......
......▒ ▒......
._...8   8..._.
.....▒   ▒.....