vocal ovcal vcoal cvoal ocval coval voacl ovacl vaocl avocl oavcl aovcl vcaol cvaol vacol avcol cavol acvol ocavl coavl oacvl aocvl caovl acovl vocla ovcla vcola cvola ocvla covla volca ovlca vloca lvoca olvca lovca vcloa cvloa vlcoa lvcoa clvoa lcvoa oclva colva olcva locva clova lcova voalc ovalc vaolc avolc oavlc aovlc volac ovlac vloac lvoac olvac lovac valoc avloc vlaoc lvaoc alvoc lavoc oalvc aolvc olavc loavc alovc laovc vcalo cvalo vaclo avclo cavlo acvlo vclao cvlao vlcao lvcao clvao lcvao valco avlco vlaco lvaco alvco lavco calvo aclvo clavo lcavo alcvo lacvo ocalv coalv oaclv aoclv caolv acolv oclav colav olcav locav cloav lcoav oalcv aolcv olacv loacv alocv laocv calov aclov claov lcaov alcov lacov
Note: these 'words' (valid or invalid) are all the permutations of the word vocal. These words are obtained by scrambling the letters in vocal.