Research: Creative Captcha

Some creative Captcha found from the internet: Instead of asking you to type what you see, now .. they give you a pool of words, some repeated ones as well and you are asked to type in 3 different words you observed. A typical OCR scan will type in everything they can scan. As you see, those are actually dictionary words. It is also possible to re-customize an OCR to do auto correction of spelling and fill in 3 words it can find.