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module LineSplitter
def self.read
$-0
end
def self.write(char)
$-0 = char
end
end
module FieldSplitter
def self.read
$,
end
def self.write(char)
$, = char
end
end
module UniqueGvar
def self.read
$used_only_in_box
end
def self.write(val)
$used_only_in_box = val
end
def self.write_only(val)
$write_only_var_in_box = val
end
def self.gvars_in_box
global_variables
end
end
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