hi guys, i am trying to grab just the fqdn ( with domainname as xyz.com) from the file with the following contents. 
AAA-BBB-CCC aaa-bbb-ccc-2345.xyz.com aa-dg-hj hira.xyz.com
ddd-eee-fff-4567.xyz.com ddd-eee-fff vffg.xyz
sunil.xyz.com    mad.xyz.com

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eg: Expected output 
aaa-bbb-ccc-2345.xyz.com
hira.xyz.com
ddd-eee-fff-4567.xyz.com
sunil.xyz.com
mad.xyz.com

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I tried the following code, but it resolves partially. 
while (<>) {
m/\s*(.*?\.xyz.com)/;
print "$1 \n";
}

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Any help would be greatly appreciated

In reply to perl regex by sunil9009

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