....##....##..
 .............
  ZZ...M......
   Z..........
    ........# 
     ......#  
     #....#   
     #....#   
     #....#   
     #....#   
     #....#   
     #....#   
     #ZZ..#   
     #ZMM.#   
     #.∩Z.#   
     ######