1---6EEE7====4=4=2 
  4-2" 2 " 3E8EEE6 2
  # |2 " "   "   # "
5EcE7EEaEa==5"6EE8=5
" #    " #  #2#    |
" #5===9Ea--8=bE8E4|
4=5#   " #  " # " |3
   #2==4 #1-5 # 2 |"
 2=7=4===7=2" 5===3"
            4==3-1 2