Figured I'd dust off my old constraint programming language (https://github.com/dbunker/SABR/blob/master/test/Real/MultipleChoice/multi.tb https://github.com/db

Figured I'd dust off my old constraint programming language (https://github.com/dbunker/SABR/blob/master/test/Real/MultipleChoice/multi.tb https://github.com/dbunker/SABR/blob/master/test/Real/Multip...) with result (https://github.com/dbunker/SABR/blob/master/test/Real/MultipleChoice/multi-expected.txt https://github.com/dbunker/SABR/blob/master/test/Real/Multip...). Fifth position being E. A bit on the verbose side, but might be preferable to some since it explicitly enumerates all the possibilities for each rule.