belts eblts blets lbets elbts lebts betls ebtls btels tbels etbls tebls bltes lbtes btles tbles ltbes tlbes eltbs letbs etlbs telbs ltebs tlebs belst eblst blest lbest elbst lebst beslt ebslt bselt sbelt esblt seblt blset lbset bslet sblet lsbet slbet elsbt lesbt eslbt selbt lsebt slebt betsl ebtsl btesl tbesl etbsl tebsl bestl ebstl bsetl sbetl esbtl sebtl btsel tbsel bstel sbtel tsbel stbel etsbl tesbl estbl setbl tsebl stebl bltse lbtse btlse tblse ltbse tlbse blste lbste bslte sblte lsbte slbte btsle tbsle bstle sbtle tsble stble ltsbe tlsbe lstbe sltbe tslbe stlbe eltsb letsb etlsb telsb ltesb tlesb elstb lestb esltb seltb lsetb sletb etslb teslb estlb setlb tselb stelb ltseb tlseb lsteb slteb tsleb stleb
Note: these 'words' (valid or invalid) are all the permutations of the word belts. These words are obtained by scrambling the letters in belts.