perts eprts prets rpets erpts repts petrs eptrs pters tpers etprs teprs prtes rptes ptres tpres rtpes trpes ertps retps etrps terps rteps treps perst eprst prest rpest erpst repst pesrt epsrt psert spert esprt seprt prset rpset psret spret rspet srpet erspt respt esrpt serpt rsept srept petsr eptsr ptesr tpesr etpsr tepsr pestr epstr psetr spetr esptr septr ptser tpser pster spter tsper stper etspr tespr estpr setpr tsepr stepr prtse rptse ptrse tprse rtpse trpse prste rpste psrte sprte rspte srpte ptsre tpsre pstre sptre tspre stpre rtspe trspe rstpe srtpe tsrpe strpe ertsp retsp etrsp tersp rtesp tresp erstp restp esrtp sertp rsetp sretp etsrp tesrp estrp setrp tserp sterp rtsep trsep rstep srtep tsrep strep
Note: these 'words' (valid or invalid) are all the permutations of the word perts. These words are obtained by scrambling the letters in perts.