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reCAPTCHA // see also http://labs.cybozu.co.jp/blog/akky/archives/2007/05/recaptcha-human-group-ocr.html
captcha OCR books database Internet education tsupo 506日前 (2007/05/25 13:17)
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reCAPTCHA // see also http://labs.cybozu.co.jp/blog/akky/archives/2007/05/recaptcha-human-group-ocr.html 
