...        
    .....  ..   
    #...   .#   
    #...  ..#   
..###...  ..###.
 ......###......
   ....._...... 
     #.....#    
     #_O<._#    
     #.....#    
   ....._...... 
 ......###......
.o###...  ..###.
    #...  ..#   
    #...   .#   
    .....  ..   
     ...