brung rbung burng ubrng rubng urbng brnug rbnug bnrug nbrug rnbug nrbug bunrg ubnrg bnurg nburg unbrg nubrg runbg urnbg rnubg nrubg unrbg nurbg brugn rbugn burgn ubrgn rubgn urbgn brgun rbgun bgrun gbrun rgbun grbun bugrn ubgrn bgurn gburn ugbrn gubrn rugbn urgbn rgubn grubn ugrbn gurbn brngu rbngu bnrgu nbrgu rnbgu nrbgu brgnu rbgnu bgrnu gbrnu rgbnu grbnu bngru nbgru bgnru gbnru ngbru gnbru rngbu nrgbu rgnbu grnbu ngrbu gnrbu bungr ubngr bnugr nbugr unbgr nubgr bugnr ubgnr bgunr gbunr ugbnr gubnr bngur nbgur bgnur gbnur ngbur gnbur ungbr nugbr ugnbr gunbr ngubr gnubr rungb urngb rnugb nrugb unrgb nurgb rugnb urgnb rgunb grunb ugrnb gurnb rngub nrgub rgnub grnub ngrub gnrub ungrb nugrb ugnrb gunrb ngurb gnurb
Note: these 'words' (valid or invalid) are all the permutations of the word brung. These words are obtained by scrambling the letters in brung.