10
10
# # # # # # # # # #
 # 9 9 . . . . 3 3 #
# 9 # . - - - - - #
 # . # - - - - - - #
# . . 5 - - - - - #
 # + + + + + 5 . . #
# + + + + + + # . #
 # + + + + + . # 9 #
# 3 3 . . . . 9 9 #
 # # # # # # # # # #