thrice htrice trhice rthice hrtice rhtice thirce htirce tihrce ithrce hitrce ihtrce trihce rtihce tirhce itrhce rithce irthce hritce rhitce hirtce ihrtce rihtce irhtce thrcie htrcie trhcie rthcie hrtcie rhtcie thcrie htcrie tchrie cthrie hctrie chtrie trchie rtchie tcrhie ctrhie rcthie crthie hrctie rhctie hcrtie chrtie rchtie crhtie thicre hticre tihcre ithcre hitcre ihtcre thcire htcire tchire cthire hctire chtire tichre itchre tcihre ctihre icthre cithre hictre ihctre hcitre chitre ichtre cihtre triche rtiche tirche itrche ritche irtche trcihe rtcihe tcrihe ctrihe rctihe crtihe ticrhe itcrhe tcirhe ctirhe ictrhe citrhe ricthe ircthe rcithe crithe icrthe cirthe hricte rhicte hircte ihrcte rihcte irhcte hrcite rhcite hcrite chrite rchite crhite hicrte ihcrte hcirte chirte ichrte cihrte richte irchte rcihte crihte icrhte cirhte thriec htriec trhiec rthiec hrtiec rhtiec thirec htirec tihrec ithrec hitrec ihtrec trihec rtihec tirhec itrhec rithec irthec hritec rhitec hirtec ihrtec rihtec irhtec threic htreic trheic rtheic hrteic rhteic theric hteric tehric ethric hetric ehtric trehic rtehic terhic etrhic rethic erthic hretic rhetic hertic ehrtic rehtic erhtic thierc htierc tiherc itherc hiterc ihterc theirc hteirc tehirc ethirc hetirc ehtirc tiehrc itehrc teihrc etihrc iethrc eithrc hietrc ihetrc heitrc ehitrc iehtrc eihtrc triehc rtiehc tirehc itrehc ritehc irtehc treihc rteihc terihc etrihc retihc ertihc tierhc iterhc teirhc etirhc ietrhc eitrhc riethc irethc reithc erithc ierthc eirthc hrietc rhietc hiretc ihretc rihetc irhetc hreitc rheitc heritc ehritc rehitc erhitc hiertc ihertc heirtc ehirtc iehrtc eihrtc riehtc irehtc reihtc erihtc ierhtc eirhtc thrcei htrcei trhcei rthcei hrtcei rhtcei thcrei htcrei tchrei cthrei hctrei chtrei trchei rtchei tcrhei ctrhei rcthei crthei hrctei rhctei hcrtei chrtei rchtei crhtei threci htreci trheci rtheci hrteci rhteci therci hterci tehrci ethrci hetrci ehtrci trehci rtehci terhci etrhci rethci erthci hretci rhetci hertci ehrtci rehtci erhtci thceri htceri tcheri ctheri hcteri chteri thecri htecri tehcri ethcri hetcri ehtcri tcehri ctehri techri etchri cethri ecthri hcetri chetri hectri ehctri cehtri echtri trcehi rtcehi tcrehi ctrehi rctehi crtehi trechi rtechi terchi etrchi retchi ertchi tcerhi cterhi tecrhi etcrhi cetrhi ectrhi rcethi crethi recthi ercthi certhi ecrthi hrceti rhceti hcreti chreti rcheti crheti hrecti rhecti hercti ehrcti rehcti erhcti hcerti cherti hecrti ehcrti cehrti echrti rcehti crehti rechti erchti cerhti ecrhti thicer hticer tihcer ithcer hitcer ihtcer thcier htcier tchier cthier hctier chtier ticher itcher tciher ctiher icther cither hicter ihcter hciter chiter ichter cihter thiecr htiecr tihecr ithecr hitecr ihtecr theicr hteicr tehicr ethicr heticr ehticr tiehcr itehcr teihcr etihcr iethcr eithcr hietcr ihetcr heitcr ehitcr iehtcr eihtcr thceir htceir tcheir ctheir hcteir chteir thecir htecir tehcir ethcir hetcir ehtcir tcehir ctehir techir etchir cethir ecthir hcetir chetir hectir ehctir cehtir echtir ticehr itcehr tciehr ctiehr ictehr citehr tiechr itechr teichr etichr ietchr eitchr tceihr cteihr tecihr etcihr cetihr ectihr icethr ciethr iecthr eicthr ceithr ecithr hicetr ihcetr hcietr chietr ichetr cihetr hiectr ihectr heictr ehictr iehctr eihctr hceitr cheitr hecitr ehcitr cehitr echitr icehtr ciehtr iechtr eichtr ceihtr ecihtr triceh rticeh tirceh itrceh ritceh irtceh trcieh rtcieh tcrieh ctrieh rctieh crtieh ticreh itcreh tcireh ctireh ictreh citreh ricteh ircteh rciteh criteh icrteh cirteh triech rtiech tirech itrech ritech irtech treich rteich terich etrich retich ertich tierch iterch teirch etirch ietrch eitrch rietch iretch reitch eritch iertch eirtch trceih rtceih tcreih ctreih rcteih crteih trecih rtecih tercih etrcih retcih ertcih tcerih cterih tecrih etcrih cetrih ectrih rcetih cretih rectih erctih certih ecrtih ticerh itcerh tcierh ctierh icterh citerh tiecrh itecrh teicrh eticrh ietcrh eitcrh tceirh cteirh tecirh etcirh cetirh ectirh icetrh cietrh iectrh eictrh ceitrh ecitrh riceth irceth rcieth crieth icreth cireth riecth irecth reicth ericth iercth eircth rceith creith recith ercith cerith ecrith icerth cierth iecrth eicrth ceirth ecirth hricet rhicet hircet ihrcet rihcet irhcet hrciet rhciet hcriet chriet rchiet crhiet hicret ihcret hciret chiret ichret cihret richet irchet rcihet crihet icrhet cirhet hriect rhiect hirect ihrect rihect irhect hreict rheict herict ehrict rehict erhict hierct iherct heirct ehirct iehrct eihrct riehct irehct reihct erihct ierhct eirhct hrceit rhceit hcreit chreit rcheit crheit hrecit rhecit hercit ehrcit rehcit erhcit hcerit cherit hecrit ehcrit cehrit echrit rcehit crehit rechit erchit cerhit ecrhit hicert ihcert hciert chiert ichert cihert hiecrt ihecrt heicrt ehicrt iehcrt eihcrt hceirt cheirt hecirt ehcirt cehirt echirt icehrt ciehrt iechrt eichrt ceihrt ecihrt riceht irceht rcieht crieht icreht cireht riecht irecht reicht ericht iercht eircht rceiht creiht reciht erciht ceriht ecriht icerht cierht iecrht eicrht ceirht ecirht
Note: these 'words' (valid or invalid) are all the permutations of the word thrice. These words are obtained by scrambling the letters in thrice.