dsrec sdrec drsec rdsec srdec rsdec dserc sderc desrc edsrc sedrc esdrc dresc rdesc dersc edrsc redsc erdsc sredc rsedc serdc esrdc resdc ersdc dsrce sdrce drsce rdsce srdce rsdce dscre sdcre dcsre cdsre scdre csdre drcse rdcse dcrse cdrse rcdse crdse srcde rscde scrde csrde rcsde crsde dsecr sdecr descr edscr sedcr esdcr dscer sdcer dcser cdser scder csder decsr edcsr dcesr cdesr ecdsr cedsr secdr escdr scedr csedr ecsdr cesdr drecs rdecs dercs edrcs redcs erdcs drces rdces dcres cdres rcdes crdes decrs edcrs dcers cders ecdrs cedrs recds ercds rceds creds ecrds cerds srecd rsecd sercd esrcd rescd erscd srced rsced scred csred rcsed crsed secrd escrd scerd cserd ecsrd cesrd recsd ercsd rcesd cresd ecrsd cersd
Note: these 'words' (valid or invalid) are all the permutations of the word dsrec. These words are obtained by scrambling the letters in dsrec.