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module Kernel
def `(cmd)
IO.popen(cmd) { |io| io.read }
end
def open(file, *rest, &block)
raise ArgumentError unless file.is_a?(String)
if file[0] == "|"
IO.popen(file[1..-1], *rest, &block)
else
File.open(file, *rest, &block)
end
end
def print(*args)
$stdout.print(*args)
end
def puts(*args)
$stdout.puts(*args)
end
def printf(*args)
$stdout.printf(*args)
end
def gets(*args)
$stdin.gets(*args)
end
end
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