http://www.typelogic.com/intj.html http://www.typelogic.com/intj.html As far as I know the letters are always in the same order. To put it in regex form: (E|I)

http://www.typelogic.com/intj.html http://www.typelogic.com/intj.html As far as I know the letters are always in the same order. To put it in regex form: (E|I)(S|N)(F|T)(J|P)