Software error:

Unescaped left brace in regex is illegal here in regex; marked by <-- HERE in m/^([a-z\-]{ <-- HERE ,20}[a-z]).*/ at /pages/03/e1/d0016251/home/htdocs/webseiten/books-by-isbn.com/cgi-bin/isbnondemand.pl line 610.

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