percs eprcs precs rpecs erpcs repcs pecrs epcrs pcers cpers ecprs ceprs prces rpces pcres cpres rcpes crpes ercps recps ecrps cerps rceps creps persc eprsc presc rpesc erpsc repsc pesrc epsrc pserc sperc esprc seprc prsec rpsec psrec sprec rspec srpec erspc respc esrpc serpc rsepc srepc pecsr epcsr pcesr cpesr ecpsr cepsr pescr epscr psecr specr espcr sepcr pcser cpser pscer spcer csper scper ecspr cespr escpr secpr csepr scepr prcse rpcse pcrse cprse rcpse crpse prsce rpsce psrce sprce rspce srpce pcsre cpsre pscre spcre cspre scpre rcspe crspe rscpe srcpe csrpe scrpe ercsp recsp ecrsp cersp rcesp cresp erscp rescp esrcp sercp rsecp srecp ecsrp cesrp escrp secrp cserp scerp rcsep crsep rscep srcep csrep screp
Note: these 'words' (valid or invalid) are all the permutations of the word percs. These words are obtained by scrambling the letters in percs.