ha yeah that was definitely the original purpose/project of reCAPTCHA.... but I think shortly after the google purchase, the AI got so good at reading garbled ancient texts that G allowed it to move on to other things..like house numbers.
House numbers are actually the easier version, you got them if reCAPTCHA already knew you're probably human. After screwing it up a few times, it punts you back into the general category and you get two words again.
