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I would like to detect the following sequences:
a
aA
aAa
aAaA
...
where a~[a-z] and A~[A-Z], the case alternates and the first letter is always lower-case.
Thanks,
Tom
The regex that @tanascius gave is fine, and based on that, a shorter one could be:
A major difference is that this one will match the empty string. I wasn’t sure from the examples if that was allowed.