##.....##   
           ##∩.....∩#   
           #∩.......∩   
           #........_   
           #........_   
           #_......._   
         ###.a.......###
         #⌠...a.......⌠#
    ######.8.........8.#
   ##∩___......###......
 ###∩........8.#  .8... 
##.............###..... 
#⌠..........###...#     
#⌠..........# #.<.#     
#⌠..........###...#     
##.............###..    
 ###∩........8.#  .8..  
   ##∩___......#   .....
    ######.8...... ..8.#
         #⌠.......  ..⌠#
         ###......  .###
            _.....      
            _.....      
            _.....