https://regex-generate.github.io/regenerate/ https://regex-generate.github.io/regenerate/ (I'm one of the authors) enumerates all the matching (and non-matching

https://regex-generate.github.io/regenerate/ https://regex-generate.github.io/regenerate/ (I'm one of the authors) enumerates all the matching (and non-matching) strings, which incidentally answers the question, but doesn't terminate in the infinite case.