...                     
                  ...   .....##           
                   ..   ......#           
                   #.## ......#           
              .#    ..# ......#           
              ...   #.# .....##           
              ....###.##.......           
              ...........h.....           
               #......#S.......           
               ######..........           
                #####bO......#.           
∆               #....<......##            
              #...######.##...            
             #.....     .# ####           
            #..#...#    .#                
     ∆      #.#.....    ..                
           #.........    .                
          ...#.......                     
          .. #........                    
                                          
                                          
                                          
                                          
                                          
                 ∆                       ∆
                                ∆         
                                          
                                          
                                          
                                          
                                          
                           ∆