ragbr argbr rgabr grabr agrbr garbr rabgr arbgr rbagr bragr abrgr bargr rgbar grbar rbgar brgar gbrar bgrar agbrr gabrr abgrr bagrr gbarr bgarr ragrb argrb rgarb grarb agrrb garrb rargb arrgb rragb rragb arrgb rargb rgrab grrab rrgab rrgab grrab rgrab agrrb garrb argrb ragrb grarb rgarb rabrg arbrg rbarg brarg abrrg barrg rarbg arrbg rrabg rrabg arrbg rarbg rbrag brrag rrbag rrbag brrag rbrag abrrg barrg arbrg rabrg brarg rbarg rgbra grbra rbgra brgra gbrra bgrra rgrba grrba rrgba rrgba grrba rgrba rbrga brrga rrbga rrbga brrga rbrga gbrra bgrra grbra rgbra brgra rbgra agbrr gabrr abgrr bagrr gbarr bgarr agrbr garbr argbr ragbr grabr rgabr abrgr bargr arbgr rabgr bragr rbagr gbrar bgrar grbar rgbar brgar rbgar
Note: these 'words' (valid or invalid) are all the permutations of the word ragbr. These words are obtained by scrambling the letters in ragbr.