purls uprls pruls rpuls urpls rupls pulrs uplrs plurs lpurs ulprs luprs prlus rplus plrus lprus rlpus lrpus urlps rulps ulrps lurps rlups lrups pursl uprsl prusl rpusl urpsl rupsl pusrl upsrl psurl spurl usprl suprl prsul rpsul psrul sprul rspul srpul urspl ruspl usrpl surpl rsupl srupl pulsr uplsr plusr lpusr ulpsr lupsr puslr upslr psulr spulr usplr suplr plsur lpsur pslur splur lspur slpur ulspr luspr uslpr sulpr lsupr slupr prlsu rplsu plrsu lprsu rlpsu lrpsu prslu rpslu psrlu sprlu rsplu srplu plsru lpsru pslru splru lspru slpru rlspu lrspu rslpu srlpu lsrpu slrpu urlsp rulsp ulrsp lursp rlusp lrusp urslp ruslp usrlp surlp rsulp srulp ulsrp lusrp uslrp sulrp lsurp slurp rlsup lrsup rslup srlup lsrup slrup
Note: these 'words' (valid or invalid) are all the permutations of the word purls. These words are obtained by scrambling the letters in purls.