.      
   ..    ...    
   #.    ..#    
   #..   ..#    
.###..   ..###..
......###...... 
 ......_.....   
    #..O..#     
    #_.<._#     
    #.....#     
 ......_.....   
......###...... 
.###..   ..###..
   #..   ..#    
   #.    ..#    
   ..    ..o    
         .