###                 
      #.#∆       #.# #    
    ###.###  ∆   #.#.#    
    +..<..+      #.#.#   .
 ######.#######  ....###..
#.............####.#..... 
####.#####.####........  .
  ##.#####.## ###..#.#....
  #.........###..........#
 ######.######..##.#...###
 +..........gr.......###  
 ######.######.......#    
      #.#    .........#   
      #.#   ###.........  
      ###     #.....#.#.. 
         ∆    ......!.... 
               ######.