brigs rbigs birgs ibrgs ribgs irbgs brgis rbgis bgris gbris rgbis grbis bigrs ibgrs bgirs gbirs igbrs gibrs rigbs irgbs rgibs gribs igrbs girbs brisg rbisg birsg ibrsg ribsg irbsg brsig rbsig bsrig sbrig rsbig srbig bisrg ibsrg bsirg sbirg isbrg sibrg risbg irsbg rsibg sribg isrbg sirbg brgsi rbgsi bgrsi gbrsi rgbsi grbsi brsgi rbsgi bsrgi sbrgi rsbgi srbgi bgsri gbsri bsgri sbgri gsbri sgbri rgsbi grsbi rsgbi srgbi gsrbi sgrbi bigsr ibgsr bgisr gbisr igbsr gibsr bisgr ibsgr bsigr sbigr isbgr sibgr bgsir gbsir bsgir sbgir gsbir sgbir igsbr gisbr isgbr sigbr gsibr sgibr rigsb irgsb rgisb grisb igrsb girsb risgb irsgb rsigb srigb isrgb sirgb rgsib grsib rsgib srgib gsrib sgrib igsrb gisrb isgrb sigrb gsirb sgirb
Note: these 'words' (valid or invalid) are all the permutations of the word brigs. These words are obtained by scrambling the letters in brigs.