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  1. or download this
    $student_hash{$name}=...CSV structure here...
  2. or download this
    use DB_File;
tie %DB_IT, "DB_File", "$filename1", O_CREAT|O_RDWR, 0666 or die "Can'
+t open $filename1: $!\n";
  3. or download this
    use DB_File;
$DB_BTREE->{'flags'}= R_DUP;
tie %D1, "DB_File", "filename2", O_CREAT|O_RDWR, 0666, $DB_BTREE or di
+e "Can't open $filename2: $!\n";