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(?(?{code}true-regexp) (?(?{code}true-regexp|false-regexp) / B (\d\d) (? (?{ $1 < 38 || $1 > 49 }) # if invalid (?=A)(?=Z) # then fail # else succeed ) /x

It could also have been written:

/ B (\d\d) (?(?{ $1 >= 38 && $1 <= 49 }) # if valid # succeed | # else (?=A)(?=Z) # fail ) /x

(?=A)(?=Z) means the next char must be an 'A' and must be a 'Z'. That's never gonna happen.

In reply to Re^4: Regex help by ikegami
in thread Regex help by C_T

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