prouls rpouls poruls opruls ropuls orpuls pruols rpuols purols uprols rupols urpols pourls opurls puorls uporls ouprls uoprls roupls orupls ruopls uropls ourpls uorpls prolus rpolus porlus oprlus roplus orplus prlous rplous plrous lprous rlpous lrpous polrus oplrus plorus lporus olprus loprus rolpus orlpus rlopus lropus olrpus lorpus prulos rpulos purlos uprlos ruplos urplos prluos rpluos plruos lpruos rlpuos lrpuos pulros uplros pluros lpuros ulpros lupros rulpos urlpos rlupos lrupos ulrpos lurpos poulrs opulrs puolrs upolrs ouplrs uoplrs polurs oplurs plours lpours olpurs lopurs pulors uplors pluors lpuors ulpors lupors oulprs uolprs oluprs louprs uloprs luoprs roulps orulps ruolps urolps ourlps uorlps rolups orlups rloups lroups olrups lorups rulops urlops rluops lruops ulrops lurops oulrps uolrps olurps lourps ulorps luorps prousl rpousl porusl oprusl ropusl orpusl pruosl rpuosl purosl uprosl ruposl urposl poursl opursl puorsl uporsl ouprsl uoprsl roupsl orupsl ruopsl uropsl ourpsl uorpsl prosul rposul porsul oprsul ropsul orpsul prsoul rpsoul psroul sproul rspoul srpoul posrul opsrul psorul sporul osprul soprul rospul orspul rsopul sropul osrpul sorpul prusol rpusol pursol uprsol rupsol urpsol prsuol rpsuol psruol spruol rspuol srpuol pusrol upsrol psurol spurol usprol suprol ruspol urspol rsupol srupol usrpol surpol pousrl opusrl puosrl uposrl oupsrl uopsrl posurl opsurl psourl spourl ospurl sopurl pusorl upsorl psuorl spuorl usporl suporl ousprl uosprl osuprl souprl usoprl suoprl rouspl oruspl ruospl urospl ourspl uorspl rosupl orsupl rsoupl sroupl osrupl sorupl rusopl ursopl rsuopl sruopl usropl suropl ousrpl uosrpl osurpl sourpl usorpl suorpl prolsu rpolsu porlsu oprlsu roplsu orplsu prlosu rplosu plrosu lprosu rlposu lrposu polrsu oplrsu plorsu lporsu olprsu loprsu rolpsu orlpsu rlopsu lropsu olrpsu lorpsu proslu rposlu porslu oprslu ropslu orpslu prsolu rpsolu psrolu sprolu rspolu srpolu posrlu opsrlu psorlu sporlu osprlu soprlu rosplu orsplu rsoplu sroplu osrplu sorplu prlsou rplsou plrsou lprsou rlpsou lrpsou prslou rpslou psrlou sprlou rsplou srplou plsrou lpsrou pslrou splrou lsprou slprou rlspou lrspou rslpou srlpou lsrpou slrpou polsru oplsru plosru lposru olpsru lopsru poslru opslru psolru spolru osplru soplru plsoru lpsoru psloru sploru lsporu slporu olspru lospru oslpru solpru lsopru slopru rolspu orlspu rlospu lrospu olrspu lorspu roslpu orslpu rsolpu srolpu osrlpu sorlpu rlsopu lrsopu rslopu srlopu lsropu slropu olsrpu losrpu oslrpu solrpu lsorpu slorpu prulso rpulso purlso uprlso ruplso urplso prluso rpluso plruso lpruso rlpuso lrpuso pulrso uplrso plurso lpurso ulprso luprso rulpso urlpso rlupso lrupso ulrpso lurpso pruslo rpuslo purslo uprslo rupslo urpslo prsulo rpsulo psrulo sprulo rspulo srpulo pusrlo upsrlo psurlo spurlo usprlo suprlo rusplo ursplo rsuplo sruplo usrplo surplo prlsuo rplsuo plrsuo lprsuo rlpsuo lrpsuo prsluo rpsluo psrluo sprluo rspluo srpluo plsruo lpsruo pslruo splruo lspruo slpruo rlspuo lrspuo rslpuo srlpuo lsrpuo slrpuo pulsro uplsro plusro lpusro ulpsro lupsro puslro upslro psulro spulro usplro suplro plsuro lpsuro psluro spluro lspuro slpuro ulspro luspro uslpro sulpro lsupro slupro rulspo urlspo rluspo lruspo ulrspo lurspo ruslpo urslpo rsulpo srulpo usrlpo surlpo rlsupo lrsupo rslupo srlupo lsrupo slrupo ulsrpo lusrpo uslrpo sulrpo lsurpo slurpo poulsr opulsr puolsr upolsr ouplsr uoplsr polusr oplusr plousr lpousr olpusr lopusr pulosr uplosr pluosr lpuosr ulposr luposr oulpsr uolpsr olupsr loupsr ulopsr luopsr pouslr opuslr puoslr uposlr oupslr uopslr posulr opsulr psoulr spoulr ospulr sopulr pusolr upsolr psuolr spuolr uspolr supolr ousplr uosplr osuplr souplr usoplr suoplr polsur oplsur plosur lposur olpsur lopsur poslur opslur psolur spolur osplur soplur plsour lpsour pslour splour lspour slpour olspur lospur oslpur solpur lsopur slopur pulsor uplsor plusor lpusor ulpsor lupsor puslor upslor psulor spulor usplor suplor plsuor lpsuor psluor spluor lspuor slpuor ulspor luspor uslpor sulpor lsupor slupor oulspr uolspr oluspr louspr ulospr luospr ouslpr uoslpr osulpr soulpr usolpr suolpr olsupr losupr oslupr solupr lsoupr sloupr ulsopr lusopr uslopr sulopr lsuopr sluopr roulsp orulsp ruolsp urolsp ourlsp uorlsp rolusp orlusp rlousp lrousp olrusp lorusp rulosp urlosp rluosp lruosp ulrosp lurosp oulrsp uolrsp olursp loursp ulorsp luorsp rouslp oruslp ruoslp uroslp ourslp uorslp rosulp orsulp rsoulp sroulp osrulp sorulp rusolp ursolp rsuolp sruolp usrolp surolp ousrlp uosrlp osurlp sourlp usorlp suorlp rolsup orlsup rlosup lrosup olrsup lorsup roslup orslup rsolup srolup osrlup sorlup rlsoup lrsoup rsloup srloup lsroup slroup olsrup losrup oslrup solrup lsorup slorup rulsop urlsop rlusop lrusop ulrsop lursop ruslop urslop rsulop srulop usrlop surlop rlsuop lrsuop rsluop srluop lsruop slruop ulsrop lusrop uslrop sulrop lsurop slurop oulsrp uolsrp olusrp lousrp ulosrp luosrp ouslrp uoslrp osulrp soulrp usolrp suolrp olsurp losurp oslurp solurp lsourp slourp ulsorp lusorp uslorp sulorp lsuorp sluorp
Note: these 'words' (valid or invalid) are all the permutations of the word prouls. These words are obtained by scrambling the letters in prouls.