.....  .........   
  ..................   
  ............3.....   
.  #......##......#    
..##......##......# .  
.....................  
.....................  
.....................  
    .#.....## ......#  
     #.....##....#...  
     #.#...#..#....## #
    .....#.....#..#[#..
  .....#.#..#..........
  #.##.###....## ##..#.
  ## ## #............. 
        #.....#..##..# 
       #.....##..#  .  
       ##...##...#     
       #.###..#..###   
       ## #.#...#..##  
          #....∩#.#.#  
          ## ..... #   
           . # ∩...    
          #......_#    
         .. ....#.#    
         #... ..#.#    
           .. ... .