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A little more about captcha

After the previous idea:



We take a strip of letters (picture).

image

Put its background in a div with height and width of 1 letter and move it up with the help of background-position. In principle, a picture with letters can be made not only vertical, but also horizontal, and generally folded as you please. From such divines you can collect a whole word. Let the bots have fun.



You can modify the idea (thanks to Lachezis ): each time you swap letters.


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Source: https://habr.com/ru/post/69822/



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