...........  
     ..........  
     ..........  
      .......#   
      ......#    
      #ZZ..#     
∆     #MZ..#     
 ∆    #....#     
 ∆    #....#    ∆
∆∆    #....#    ∆
∆∆∆   #....#   ∆∆
∆∆    #....#   ∆∆
 ∆    #....#   ∆∆
 ∆    #.∩∩.#   ∆∆
      ######