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fwlog.14Mar2005.gz fwlog.15Mar2005.gz ... fwlog.7Mar2005.gz fwlog.8Mar2005.gz fwlog.9Mar2005.gz
for (@files){ $_ =~ /fwlogsum\.(\d+)\w+/; ... for (sort{$a <=> $b} @days){ print "fwlog" . $_ . ".Mar2005\n"; }