stepup tsepup setpup estpup tespup etspup stpeup tspeup spteup psteup tpseup ptseup septup esptup spetup psetup epstup pestup tepsup etpsup tpesup ptesup eptsup petsup steupp tseupp setupp estupp tesupp etsupp stuepp tsuepp sutepp ustepp tusepp utsepp seutpp esutpp suetpp usetpp eustpp uestpp teuspp etuspp tuespp utespp eutspp uetspp stpuep tspuep sptuep pstuep tpsuep ptsuep stupep tsupep sutpep ustpep tuspep utspep sputep psutep suptep usptep pustep upstep tpusep ptusep tupsep utpsep putsep uptsep seputp esputp speutp pseutp epsutp pesutp seuptp esuptp sueptp useptp eusptp uesptp spuetp psuetp supetp uspetp pusetp upsetp epustp peustp eupstp uepstp puestp upestp tepusp etpusp tpeusp pteusp eptusp petusp teupsp etupsp tuepsp utepsp eutpsp uetpsp tpuesp ptuesp tupesp utpesp putesp uptesp eputsp peutsp euptsp ueptsp puetsp upetsp steppu tseppu setppu estppu tesppu etsppu stpepu tspepu sptepu pstepu tpsepu ptsepu septpu esptpu spetpu psetpu epstpu pestpu tepspu etpspu tpespu ptespu eptspu petspu steppu tseppu setppu estppu tesppu etsppu stpepu tspepu sptepu pstepu tpsepu ptsepu septpu esptpu spetpu psetpu epstpu pestpu tepspu etpspu tpespu ptespu eptspu petspu stppeu tsppeu sptpeu pstpeu tpspeu ptspeu stppeu tsppeu sptpeu pstpeu tpspeu ptspeu sppteu pspteu sppteu pspteu ppsteu ppsteu tppseu ptpseu tppseu ptpseu pptseu pptseu sepptu espptu speptu pseptu epsptu pesptu sepptu espptu speptu pseptu epsptu pesptu sppetu pspetu sppetu pspetu ppsetu ppsetu eppstu pepstu eppstu pepstu ppestu ppestu teppsu etppsu tpepsu ptepsu eptpsu petpsu teppsu etppsu tpepsu ptepsu eptpsu petpsu tppesu ptpesu tppesu ptpesu pptesu pptesu epptsu peptsu epptsu peptsu ppetsu ppetsu steupp tseupp setupp estupp tesupp etsupp stuepp tsuepp sutepp ustepp tusepp utsepp seutpp esutpp suetpp usetpp eustpp uestpp teuspp etuspp tuespp utespp eutspp uetspp stepup tsepup setpup estpup tespup etspup stpeup tspeup spteup psteup tpseup ptseup septup esptup spetup psetup epstup pestup tepsup etpsup tpesup ptesup eptsup petsup stupep tsupep sutpep ustpep tuspep utspep stpuep tspuep sptuep pstuep tpsuep ptsuep suptep usptep sputep psutep upstep pustep tupsep utpsep tpusep ptusep uptsep putsep seuptp esuptp sueptp useptp eusptp uesptp seputp esputp speutp pseutp epsutp pesutp supetp uspetp spuetp psuetp upsetp pusetp eupstp uepstp epustp peustp upestp puestp teupsp etupsp tuepsp utepsp eutpsp uetpsp tepusp etpusp tpeusp pteusp eptusp petusp tupesp utpesp tpuesp ptuesp uptesp putesp euptsp ueptsp eputsp peutsp upetsp puetsp stpupe tspupe sptupe pstupe tpsupe ptsupe stuppe tsuppe sutppe ustppe tusppe utsppe sputpe psutpe suptpe usptpe pustpe upstpe tpuspe ptuspe tupspe utpspe putspe uptspe stppue tsppue sptpue pstpue tpspue ptspue stppue tsppue sptpue pstpue tpspue ptspue spptue psptue spptue psptue ppstue ppstue tppsue ptpsue tppsue ptpsue pptsue pptsue stuppe tsuppe sutppe ustppe tusppe utsppe stpupe tspupe sptupe pstupe tpsupe ptsupe suptpe usptpe sputpe psutpe upstpe pustpe tupspe utpspe tpuspe ptuspe uptspe putspe spupte psupte suppte usppte puspte upspte sppute pspute sppute pspute ppsute ppsute suppte usppte spupte psupte upspte puspte pupste uppste ppuste ppuste uppste pupste tpupse ptupse tuppse utppse putpse uptpse tppuse ptpuse tppuse ptpuse pptuse pptuse tuppse utppse tpupse ptupse uptpse putpse puptse upptse pputse pputse upptse puptse sepupt espupt speupt pseupt epsupt pesupt seuppt esuppt sueppt useppt eusppt uesppt spuept psuept supept uspept pusept upsept epuspt peuspt eupspt uepspt puespt upespt sepput espput speput pseput epsput pesput sepput espput speput pseput epsput pesput sppeut pspeut sppeut pspeut ppseut ppseut eppsut pepsut eppsut pepsut ppesut ppesut seuppt esuppt sueppt useppt eusppt uesppt sepupt espupt speupt pseupt epsupt pesupt supept uspept spuept psuept upsept pusept eupspt uepspt epuspt peuspt upespt puespt spupet psupet suppet usppet puspet upspet sppuet pspuet sppuet pspuet ppsuet ppsuet suppet usppet spupet psupet upspet puspet pupset uppset ppuset ppuset uppset pupset epupst peupst euppst ueppst puepst upepst eppust pepust eppust pepust ppeust ppeust euppst ueppst epupst peupst upepst puepst pupest uppest ppuest ppuest uppest pupest tepups etpups tpeups pteups eptups petups teupps etupps tuepps utepps eutpps uetpps tpueps ptueps tupeps utpeps puteps upteps eputps peutps euptps ueptps puetps upetps teppus etppus tpepus ptepus eptpus petpus teppus etppus tpepus ptepus eptpus petpus tppeus ptpeus tppeus ptpeus ppteus ppteus epptus peptus epptus peptus ppetus ppetus teupps etupps tuepps utepps eutpps uetpps tepups etpups tpeups pteups eptups petups tupeps utpeps tpueps ptueps upteps puteps euptps ueptps eputps peutps upetps puetps tpupes ptupes tuppes utppes putpes uptpes tppues ptpues tppues ptpues pptues pptues tuppes utppes tpupes ptupes uptpes putpes puptes upptes pputes pputes upptes puptes epupts peupts euppts ueppts puepts upepts epputs peputs epputs peputs ppeuts ppeuts euppts ueppts epupts peupts upepts puepts pupets uppets ppuets ppuets uppets pupets
Note: these 'words' (valid or invalid) are all the permutations of the word stepup. These words are obtained by scrambling the letters in stepup.