use 5.010;
use strict;
use warnings;

my $block;
my $ua;
while ($ua=<DATA>) {
	chomp $ua;
	$block->{_comment} = $ua;
	if ($block->{_comment} =~ /Trident\/[\d.]+;\s+(?:.+)?rv:([\d.]+)/) {
		say "$ua --> IE $1";
	}
}

# UAs siehe http://blogs.msdn.com/b/ieinternals/archive/2013/09/21/internet-explorer-11-user-agent-string-ua-string-sniffing-compatibility-with-gecko-webkit.aspx
# https://iecvlist.microsoft.com/IE11/1375395130872/iecompatviewlist.xml
__DATA__
Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
Mozilla/5.0 (Windows NT 6.3; Trident/7.0; .NET4.0E; .NET4.0C; rv:11.0) like Gecko
Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.52 Safari/536.5
Mozilla/5.0 (Windows NT 6.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36
Mozilla/5.0 (Windows NT 6.2; rv:12.0) Gecko/20100101 Firefox/12.0
Mozilla/5.0 ($PLATFORM; Trident/7.0; rv:11.0) like Gecko/20100101 Firefox/12.0
Mozilla/5.0 ($PLATFORM; Trident/7.0; rv:11.0) like Gecko/20100101 Firefox/22.0
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
Mozilla/5.0 (compatible; MSIE 10.0; $PLATFORM; Trident/7.0)
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)
Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/5.0 (compatible; MSIE 10.0; Windows Phone 8.0; Trident/6.0; IEMobile/10.0; ARM; Touch)
Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0)
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0; Xbox; Xbox One)
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; Xbox)
Mozilla/5.0 (Windows NT 6.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36
Mozilla/5.0 (Windows NT 6.2; rv:12.0) Gecko/20100101 Firefox/23.0
Mozilla/5.0 (Windows NT 6.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36 OPR/15.0.1147.153
Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25
Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)