1  xxrjr  ftttt
 2  xxxxxjjfffft
 3  xxxxxxxjjjjj
 4  xxxxxxxjjjjj
 5  xxxxxxxxxnxx
 6    xxxxxxxn
 7       $2[[
 8////   [[
 9////   [[
10///////[[
11  /////]]
12       [[
13       [[
14       [[
15       [[
16       [[
17       []