..        
       #.#       
   .####..       
   .......       
   ...)...##     
 ..........###   
.........#..<#   
.........#..##   
.....%....K.##   
.........#...#   
.........#s..#   
.......Kb#...#   
.........#...#   
 ######s##.#.#   
#........s.#.#   
#.............#  
#........###..#  
####.....#  ..#  
   #.....#  .... 
   #.....#   ....
∆  +.....#    .##
   #.....#