AOJ 2040 Sort the Panels

Solved Users (link to submissions)
aizu_a
aizu_z
arrows
bal4u
blue_jam
ChanKingSan2
cpp575
Daiki_Ando
dango_colonel
DEGwer
dream132
E869120
ee67052
eha
ei1333
emoken
fura2
ichyo
ir5
ishikado
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lyrically
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NOxus7
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OvsH
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Respect2D
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