Number Captcha

Hello the capcha is not safe anymore.With numbers the captcha ist unsafe,bots doesn't got problems with this.Please change it again in 2 words its the only way to make captchas safe.Thank you -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://groups.google.com/group/recaptcha. For more options, visit https://groups.google.com/groups/opt_out.