drats rdats darts adrts radts ardts drtas rdtas dtras tdras rtdas trdas datrs adtrs dtars tdars atdrs tadrs ratds artds rtads trads atrds tards drast rdast darst adrst radst ardst drsat rdsat dsrat sdrat rsdat srdat dasrt adsrt dsart sdart asdrt sadrt rasdt arsdt rsadt sradt asrdt sardt drtsa rdtsa dtrsa tdrsa rtdsa trdsa drsta rdsta dsrta sdrta rsdta srdta dtsra tdsra dstra sdtra tsdra stdra rtsda trsda rstda srtda tsrda strda datsr adtsr dtasr tdasr atdsr tadsr dastr adstr dsatr sdatr asdtr sadtr dtsar tdsar dstar sdtar tsdar stdar atsdr tasdr astdr satdr tsadr stadr ratsd artsd rtasd trasd atrsd tarsd rastd arstd rsatd sratd asrtd sartd rtsad trsad rstad srtad tsrad strad atsrd tasrd astrd satrd tsard stard
Note: these 'words' (valid or invalid) are all the permutations of the word drats. These words are obtained by scrambling the letters in drats.