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<?php
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if (!$in = fopen('input.txt', 'r')) {
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die('Could not open input file.');
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}
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if (!$out = fopen('output.txt', 'w')) {
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die('Could not open output file.');
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}
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while (!feof($in)) {
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$data = fread($in, 512);
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fwrite($out, $data);
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}
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fclose($out);
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fclose($in);
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?>
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