praus rpaus parus aprus rapus arpus pruas rpuas puras upras rupas urpas paurs apurs puars upars auprs uaprs raups arups ruaps uraps aurps uarps prasu rpasu parsu aprsu rapsu arpsu prsau rpsau psrau sprau rspau srpau pasru apsru psaru sparu aspru sapru raspu arspu rsapu srapu asrpu sarpu prusa rpusa pursa uprsa rupsa urpsa prsua rpsua psrua sprua rspua srpua pusra upsra psura spura uspra supra ruspa urspa rsupa srupa usrpa surpa pausr apusr puasr upasr aupsr uapsr pasur apsur psaur spaur aspur sapur pusar upsar psuar spuar uspar supar auspr uaspr asupr saupr usapr suapr rausp arusp ruasp urasp aursp uarsp rasup arsup rsaup sraup asrup sarup rusap ursap rsuap sruap usrap surap ausrp uasrp asurp saurp usarp suarp
Note: these 'words' (valid or invalid) are all the permutations of the word praus. These words are obtained by scrambling the letters in praus.