bbbbbbbb
                     1111111  b::::::b                                                                   tttt
                    1::::::1  b::::::b                                                                ttt:::t
                   1:::::::1  b::::::b                                                                t:::::t
                   111:::::1   b:::::b                                                                t:::::t
   qqqqqqqqq   qqqqq  1::::1   b:::::bbbbbbbbb            nnnn  nnnnnnnn        eeeeeeeeeeee    ttttttt:::::ttttttt
  q:::::::::qqq::::q  1::::1   b::::::::::::::bb          n:::nn::::::::nn    ee::::::::::::ee  t:::::::::::::::::t
 q:::::::::::::::::q  1::::1   b::::::::::::::::b         n::::::::::::::nn  e::::::eeeee:::::eet:::::::::::::::::t
q::::::qqqqq::::::qq  1::::l   b:::::bbbbb:::::::b        nn:::::::::::::::ne::::::e     e:::::etttttt:::::::tttttt
q:::::q     q:::::q   1::::l   b:::::b    b::::::b          n:::::nnnn:::::ne:::::::eeeee::::::e      t:::::t
q:::::q     q:::::q   1::::l   b:::::b     b:::::b          n::::n    n::::ne:::::::::::::::::e       t:::::t
q:::::q     q:::::q   1::::l   b:::::b     b:::::b          n::::n    n::::ne::::::eeeeeeeeeee        t:::::t
q::::::q    q:::::q   1::::l   b:::::b     b:::::b          n::::n    n::::ne:::::::e                 t:::::t    tttttt
q:::::::qqqqq:::::q111::::::111b:::::bbbbbb::::::b          n::::n    n::::ne::::::::e                t::::::tttt:::::t
 q::::::::::::::::q1::::::::::1b::::::::::::::::b  ......   n::::n    n::::n e::::::::eeeeeeee        tt::::::::::::::t
  qq::::::::::::::q1::::::::::1b:::::::::::::::b   .::::.   n::::n    n::::n  ee:::::::::::::e          tt:::::::::::tt
    qqqqqqqq::::::q111111111111bbbbbbbbbbbbbbbb    ......   nnnnnn    nnnnnn    eeeeeeeeeeeeee            ttttttttttt
            q:::::q
            q:::::q
           q:::::::q
           q:::::::q
           q:::::::q
           qqqqqqqqq