chert hcert cehrt echrt hecrt ehcrt chret hcret crhet rchet hrcet rhcet cerht ecrht creht rceht ercht recht herct ehrct hrect rhect erhct rehct chetr hcetr cehtr echtr hectr ehctr chter hcter cther tcher htcer thcer cethr ecthr ctehr tcehr etchr techr hetcr ehtcr htecr thecr ethcr tehcr chrte hcrte crhte rchte hrcte rhcte chtre hctre cthre tchre htcre thcre crthe rcthe ctrhe tcrhe rtche trche hrtce rhtce htrce thrce rthce trhce certh ecrth creth rceth ercth recth cetrh ectrh cterh tcerh etcrh tecrh crteh rcteh ctreh tcreh rtceh trceh ertch retch etrch terch rtech trech hertc ehrtc hretc rhetc erhtc rehtc hetrc ehtrc hterc therc ethrc tehrc hrtec rhtec htrec threc rthec trhec erthc rethc etrhc terhc rtehc trehc
Note: these 'words' (valid or invalid) are all the permutations of the word chert. These words are obtained by scrambling the letters in chert.