$subject="DA77B47025A3FBD0B0F9811296AE555E";
$subject=preg_replace("/([0-9a-z]{8})([0-9a-z]{8})([0-9a-z]{8})([0-9a-z]{8})/i", '${1}-${2}-${3}-${4}', $subject);
DA77B470-25A3FBD0-B0F98112-96AE555E
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