....##....##...  
 ...............  
  .....MMM......  
   .......M....   
    #........#    
     #......#     
      #....#      
∆     #....#      
∆∆    #....#    ∆∆
∆∆    #....#     ∆
∆     #....#     ∆
∆∆∆   #....#     ∆
∆∆∆   #....#   ∆∆∆
 ∆∆   #..MZ#   ∆∆ 
 ∆∆   #)ZM.#    ∆ 
      ######