http://www.perlmonks.org?node_id=361149

my @agents = qq["Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1. +8.1.6)", "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)", "Mozil +la/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322", "Mo +zilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322)", + "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT 5.1; .NET CLR 1.1.432 +2)", "Internet Explorer 5", "Opera/9.20 (Windows NT 6.0; U; en)", "Op +era/9.00 (Windows NT 5.1; U; en) ", "Mozilla/4.0 (compatible; MSIE 6. +0; Windows NT 5.1; en)", "Mozilla/4.0 (compatible; MSIE 6.0; Windows +NT 5.1; en)", "Mozilla/4.0 (compatible; MSIE 6.0; MSIE 5.5; Windows N +T 5.1)", "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5)"] +;