http://qs321.pair.com?node_id=402376


in reply to Re: Regex help
in thread Regex help

or
/B(?:3[89]|4\d)/
or
/B(?!3[0-7])[34]\d/
or
/B(\d\d)(?(?{ $1 < 38 || $1 > 49 })(?=A)(?=Z))/