upstra pustra usptra suptra psutra sputra uptsra putsra utpsra tupsra ptusra tpusra ustpra sutpra utspra tuspra stupra tsupra pstura sptura ptsura tpsura stpura tspura upsrta pusrta usprta suprta psurta spurta uprsta pursta urpsta rupsta prusta rpusta usrpta surpta urspta ruspta srupta rsupta psruta spruta prsuta rpsuta srputa rsputa uptrsa putrsa utprsa tuprsa ptursa tpursa uprtsa purtsa urptsa ruptsa prutsa rputsa utrpsa turpsa urtpsa rutpsa trupsa rtupsa ptrusa tprusa prtusa rptusa trpusa rtpusa ustrpa sutrpa utsrpa tusrpa sturpa tsurpa usrtpa surtpa urstpa rustpa srutpa rsutpa utrspa turspa urtspa rutspa truspa rtuspa strupa tsrupa srtupa rstupa trsupa rtsupa pstrua sptrua ptsrua tpsrua stprua tsprua psrtua sprtua prstua rpstua srptua rsptua ptrsua tprsua prtsua rptsua trpsua rtpsua strpua tsrpua srtpua rstpua trspua rtspua upstar pustar usptar suptar psutar sputar uptsar putsar utpsar tupsar ptusar tpusar ustpar sutpar utspar tuspar stupar tsupar pstuar sptuar ptsuar tpsuar stpuar tspuar upsatr pusatr uspatr supatr psuatr spuatr upastr puastr uapstr aupstr paustr apustr usaptr suaptr uasptr ausptr sauptr asuptr psautr spautr pasutr apsutr saputr asputr uptasr putasr utpasr tupasr ptuasr tpuasr upatsr puatsr uaptsr auptsr pautsr aputsr utapsr tuapsr uatpsr autpsr taupsr atupsr ptausr tpausr patusr aptusr tapusr atpusr ustapr sutapr utsapr tusapr stuapr tsuapr usatpr suatpr uastpr austpr sautpr asutpr utaspr tuaspr uatspr autspr tauspr atuspr staupr tsaupr satupr astupr tasupr atsupr pstaur sptaur ptsaur tpsaur stpaur tspaur psatur spatur pastur apstur saptur asptur ptasur tpasur patsur aptsur tapsur atpsur stapur tsapur satpur astpur taspur atspur upsrat pusrat usprat suprat psurat spurat uprsat pursat urpsat rupsat prusat rpusat usrpat surpat urspat ruspat srupat rsupat psruat spruat prsuat rpsuat srpuat rspuat upsart pusart uspart supart psuart spuart upasrt puasrt uapsrt aupsrt pausrt apusrt usaprt suaprt uasprt ausprt sauprt asuprt psaurt spaurt pasurt apsurt sapurt aspurt uprast purast urpast rupast pruast rpuast uparst puarst uaprst auprst paurst apurst urapst ruapst uarpst aurpst raupst arupst praust rpaust parust aprust rapust arpust usrapt surapt ursapt rusapt sruapt rsuapt usarpt suarpt uasrpt ausrpt saurpt asurpt uraspt ruaspt uarspt aurspt rauspt aruspt sraupt rsaupt sarupt asrupt rasupt arsupt psraut spraut prsaut rpsaut srpaut rspaut psarut sparut pasrut apsrut saprut asprut prasut rpasut parsut aprsut rapsut arpsut sraput rsaput sarput asrput rasput arsput uptras putras utpras tupras pturas tpuras uprtas purtas urptas ruptas prutas rputas utrpas turpas urtpas rutpas trupas rtupas ptruas tpruas prtuas rptuas trpuas rtpuas uptars putars utpars tupars ptuars tpuars upatrs puatrs uaptrs auptrs pautrs aputrs utaprs tuaprs uatprs autprs tauprs atuprs ptaurs tpaurs paturs apturs tapurs atpurs uprats purats urpats rupats pruats rpuats uparts puarts uaprts auprts paurts apurts urapts ruapts uarpts aurpts raupts arupts prauts rpauts paruts apruts raputs arputs utraps turaps urtaps rutaps truaps rtuaps utarps tuarps uatrps autrps taurps aturps uratps ruatps uartps aurtps rautps arutps traups rtaups tarups atrups ratups artups ptraus tpraus prtaus rptaus trpaus rtpaus ptarus tparus patrus aptrus taprus atprus pratus rpatus partus aprtus raptus arptus trapus rtapus tarpus atrpus ratpus artpus ustrap sutrap utsrap tusrap sturap tsurap usrtap surtap urstap rustap srutap rsutap utrsap tursap urtsap rutsap trusap rtusap struap tsruap srtuap rstuap trsuap rtsuap ustarp sutarp utsarp tusarp stuarp tsuarp usatrp suatrp uastrp austrp sautrp asutrp utasrp tuasrp uatsrp autsrp tausrp atusrp staurp tsaurp saturp asturp tasurp atsurp usratp suratp ursatp rusatp sruatp rsuatp usartp suartp uasrtp ausrtp saurtp asurtp urastp ruastp uarstp aurstp raustp arustp srautp rsautp sarutp asrutp rasutp arsutp utrasp turasp urtasp rutasp truasp rtuasp utarsp tuarsp uatrsp autrsp taursp atursp uratsp ruatsp uartsp aurtsp rautsp arutsp trausp rtausp tarusp atrusp ratusp artusp straup tsraup srtaup rstaup trsaup rtsaup starup tsarup satrup astrup tasrup atsrup sratup rsatup sartup asrtup rastup arstup trasup rtasup tarsup atrsup ratsup artsup pstrau sptrau ptsrau tpsrau stprau tsprau psrtau sprtau prstau rpstau srptau rsptau ptrsau tprsau prtsau rptsau trpsau rtpsau strpau tsrpau srtpau rstpau trspau rtspau pstaru sptaru ptsaru tpsaru stparu tsparu psatru spatru pastru apstru saptru asptru ptasru tpasru patsru aptsru tapsru atpsru stapru tsapru satpru astpru taspru atspru psratu spratu prsatu rpsatu srpatu rspatu psartu spartu pasrtu apsrtu saprtu asprtu prastu rpastu parstu aprstu rapstu arpstu sraptu rsaptu sarptu asrptu rasptu arsptu ptrasu tprasu prtasu rptasu trpasu rtpasu ptarsu tparsu patrsu aptrsu taprsu atprsu pratsu rpatsu partsu aprtsu raptsu arptsu trapsu rtapsu tarpsu atrpsu ratpsu artpsu strapu tsrapu srtapu rstapu trsapu rtsapu starpu tsarpu satrpu astrpu tasrpu atsrpu sratpu rsatpu sartpu asrtpu rastpu arstpu traspu rtaspu tarspu atrspu ratspu artspu
Note: these 'words' (valid or invalid) are all the permutations of the word upstra. These words are obtained by scrambling the letters in upstra.