..#              
                   ..#              
                   #.#              
                  ##.##             
                 ##...##  ..        
             #####.....##...        
             #..#.......#...        
             #......_.......    ∆   
             #.##.......##.#        
             #.###.....###.###      
             #...##...##.....#      
             #.##.##.##.#..#.#      
   #         #.......##.#.##.###    
   #.      ###.##...÷...)......#    
   #..######......##.##.##.#.#.#    
   #...†........#.##.##.##.#.#      
.....###.###.........##......#      
.##    #.# #....#.########.###      
       #.###.#..#÷#     ##.##       
       #.##.......#     #...#       
       .^.#.......#     #...#       
       ..#.......##     #...#       
       ...#......###    #...#       
       ...#........######...###### #
       .. #......#.#.............#.#
         ..........................#
         .###....#.#..........<..###
            #.##.#)######...######  
            #......#    #...#       
            ####.###    #...#       
               #.#      #....       
               ..#      #...        
              ..##      ##          
             #..                    
             ##S                    
              b.                    
              ..