grep usage

I am trying to grep an array return the lines that match. From  my
reading I see that grep returns the number of times an expression was
true not the actual expression. My question is how would I get the
actual expression. 
I tested my code with a small input file of 2 records. The first one is
in the  @mhsarray the second one is not.
I am trying to get my output file to have "CISCSTT6....line from
@mhsarray that it matched".

$ cat mhs.pl
#!/usr/bin/perl
use warnings;

        $file="/adsm/nodes";
        $mhs="/adsm/mhs_alloc";
        $file_out="/adsm/in_mhs";

        open (INFILE, "<", "$file") or
                        die "$file could not be opened: $!";
        open (MHSFILE, "<", "$mhs") or
                        die "$mhs could not be opened: $!";
        open (OUTFILE, ">", "$file_out") or
                        die "$file_out could not be opened: $!";

        while (<MHSFILE>) {
                chomp($_);
                push (@mhsArray, $_);
                }

        foreach $line (<INFILE>) {
                chomp($line);
                print "this is line $line\n";
                @inmhs =  grep(/$line/,@mhsArray);
        print "size of inmhs array is $#inmhs\n";
                if ($#inmhs > -1) {
                print (OUTFILE "$line\n"); # would like to be
$line...line from @mhsArray
#               print "$_\n";
                }
                } #end foreach
close(INFILE);
close(MHSFILE);
close(OUTFILE);
cicstt6 () [ /a
Reggie Johnson
TSM Admin
904.218.4620
Jacksonville, Fl
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• grep usage by Johnson, Reginald
• Re: grep usage by John W. Krahn
• Re: grep usage by yitzle