ratbg artbg rtabg trabg atrbg tarbg rabtg arbtg rbatg bratg abrtg bartg rtbag trbag rbtag brtag tbrag btrag atbrg tabrg abtrg batrg tbarg btarg ratgb artgb rtagb tragb atrgb targb ragtb argtb rgatb gratb agrtb gartb rtgab trgab rgtab grtab tgrab gtrab atgrb tagrb agtrb gatrb tgarb gtarb rabgt arbgt rbagt bragt abrgt bargt ragbt argbt rgabt grabt agrbt garbt rbgat brgat rgbat grbat bgrat gbrat abgrt bagrt agbrt gabrt bgart gbart rtbga trbga rbtga brtga tbrga btrga rtgba trgba rgtba grtba tgrba gtrba rbgta brgta rgbta grbta bgrta gbrta tbgra btgra tgbra gtbra bgtra gbtra atbgr tabgr abtgr batgr tbagr btagr atgbr tagbr agtbr gatbr tgabr gtabr abgtr bagtr agbtr gabtr bgatr gbatr tbgar btgar tgbar gtbar bgtar gbtar
Note: these 'words' (valid or invalid) are all the permutations of the word ratbg. These words are obtained by scrambling the letters in ratbg.