use strict;
use warnings;

while (<DATA>) {
	print "$_\n" for grep /\.xyz\.com$/, split;
}

__DATA__
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