#finding @dh.nl
#!/usr/bin/perl -w

my $file="logs1";
chomp $file;

open (FILE, $file) || die "Can't open logs file: $!\n";
my @line =(<FILE>);
chomp (@line); 
foreach (@line){ 
	if (/(\D+)(@)(dh.nl)/) {
	 $a=$1;
	 $b=$2;
	 $c=$3;
	}
} 
print "$a"."$b"."$c"."\n";
close FILE;