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The first one is available here: http://regex.inginf.units.it/

It uses genetic programming to build the regular expression.




https://regex.inginf.units.it/ only needed 5 seconds to generate /(?<=Rd )\d++/ when I highlighted 9856, 10190, 9753 and 8883.

https://regex.ai/ was stuck with /9856|10190|9753|8883/ and confidently emitted /\d{4}/ as an alternative.

https://regex101.com/r/cAaV1z/1 confirms the former.




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