crept rcept cerpt ecrpt recpt ercpt crpet rcpet cpret pcret rpcet prcet ceprt ecprt cpert pcert epcrt pecrt repct erpct rpect prect eprct perct cretp rcetp certp ecrtp rectp erctp crtep rctep ctrep tcrep rtcep trcep cetrp ectrp cterp tcerp etcrp tecrp retcp ertcp rtecp trecp etrcp tercp crpte rcpte cprte pcrte rpcte prcte crtpe rctpe ctrpe tcrpe rtcpe trcpe cptre pctre ctpre tcpre ptcre tpcre rptce prtce rtpce trpce ptrce tprce ceptr ecptr cpetr pcetr epctr pectr cetpr ectpr ctepr tcepr etcpr tecpr cpter pcter ctper tcper ptcer tpcer eptcr petcr etpcr tepcr ptecr tpecr reptc erptc rpetc pretc eprtc pertc retpc ertpc rtepc trepc etrpc terpc rptec prtec rtpec trpec ptrec tprec eptrc petrc etprc teprc pterc tperc
Note: these 'words' (valid or invalid) are all the permutations of the word crept. These words are obtained by scrambling the letters in crept.