biner ibner bnier nbier inber niber bienr ibenr beinr ebinr iebnr eibnr bneir nbeir benir ebnir nebir enbir inebr niebr ienbr einbr neibr enibr binre ibnre bnire nbire inbre nibre birne ibrne brine rbine irbne ribne bnrie nbrie brnie rbnie nrbie rnbie inrbe nirbe irnbe rinbe nribe rnibe biern ibern beirn ebirn iebrn eibrn biren ibren brien rbien irben riben berin ebrin brein rbein erbin rebin ierbn eirbn irebn riebn eribn reibn bneri nberi benri ebnri nebri enbri bnrei nbrei brnei rbnei nrbei rnbei berni ebrni breni rbeni erbni rebni nerbi enrbi nrebi rnebi ernbi renbi inerb nierb ienrb einrb neirb enirb inreb nireb irneb rineb nrieb rnieb iernb eirnb irenb rienb erinb reinb nerib enrib nreib rneib ernib renib
Note: these 'words' (valid or invalid) are all the permutations of the word biner. These words are obtained by scrambling the letters in biner.