thars htars tahrs athrs hatrs ahtrs thras htras trhas rthas hrtas rhtas tarhs atrhs trahs rtahs arths raths harts ahrts hrats rhats arhts rahts thasr htasr tahsr athsr hatsr ahtsr thsar htsar tshar sthar hstar shtar tashr atshr tsahr stahr asthr sathr hastr ahstr hsatr shatr ashtr sahtr thrsa htrsa trhsa rthsa hrtsa rhtsa thsra htsra tshra sthra hstra shtra trsha rtsha tsrha strha rstha srtha hrsta rhsta hsrta shrta rshta srhta tarsh atrsh trash rtash artsh ratsh tasrh atsrh tsarh starh astrh satrh trsah rtsah tsrah strah rstah srtah arsth rasth asrth sarth rsath srath harst ahrst hrast rhast arhst rahst hasrt ahsrt hsart shart ashrt sahrt hrsat rhsat hsrat shrat rshat srhat arsht rasht asrht sarht rsaht sraht
Note: these 'words' (valid or invalid) are all the permutations of the word thars. These words are obtained by scrambling the letters in thars.