                                
                #####          #
bb#       #  1 b#####    b  3#b#
==#       #======   =========#==
  #2  bb  #     4    #   bb  #  
  #=======#          #=======#  
  #       #   b      #   #   #  
  #       =====  ========#      
  #  b    #          # b #   b  
  #=======#          #====   =  
          # b      b #          
          #====   ===#          
  b  #    #     b    #     bb   
=====#=====     b    #==========
     #  bb#     b    #    #     
     #====#     =    =====#     
 # b #    #b              #     
=#====    ==              #=====
 #              s  b     b#     
================================