brins rbins birns ibrns ribns irbns brnis rbnis bnris nbris rnbis nrbis binrs ibnrs bnirs nbirs inbrs nibrs rinbs irnbs rnibs nribs inrbs nirbs brisn rbisn birsn ibrsn ribsn irbsn brsin rbsin bsrin sbrin rsbin srbin bisrn ibsrn bsirn sbirn isbrn sibrn risbn irsbn rsibn sribn isrbn sirbn brnsi rbnsi bnrsi nbrsi rnbsi nrbsi brsni rbsni bsrni sbrni rsbni srbni bnsri nbsri bsnri sbnri nsbri snbri rnsbi nrsbi rsnbi srnbi nsrbi snrbi binsr ibnsr bnisr nbisr inbsr nibsr bisnr ibsnr bsinr sbinr isbnr sibnr bnsir nbsir bsnir sbnir nsbir snbir insbr nisbr isnbr sinbr nsibr snibr rinsb irnsb rnisb nrisb inrsb nirsb risnb irsnb rsinb srinb isrnb sirnb rnsib nrsib rsnib srnib nsrib snrib insrb nisrb isnrb sinrb nsirb snirb
Note: these 'words' (valid or invalid) are all the permutations of the word brins. These words are obtained by scrambling the letters in brins.