fecit efcit fceit cfeit ecfit cefit feict efict fiect ifect eifct iefct fciet cfiet ficet ifcet cifet icfet ecift ceift eicft iecft cieft iceft fecti efcti fceti cfeti ecfti cefti fetci eftci fteci tfeci etfci tefci fctei cftei ftcei tfcei ctfei tcfei ectfi cetfi etcfi tecfi ctefi tcefi feitc efitc fietc ifetc eiftc ieftc fetic eftic fteic tfeic etfic tefic fitec iftec ftiec tfiec itfec tifec eitfc ietfc etifc teifc itefc tiefc fcite cfite ficte ifcte cifte icfte fctie cftie ftcie tfcie ctfie tcfie fitce iftce ftice tfice itfce tifce citfe ictfe ctife tcife itcfe ticfe ecitf ceitf eictf iectf cietf icetf ectif cetif etcif tecif cteif tceif eitcf ietcf eticf teicf itecf tiecf citef ictef ctief tcief itcef ticef
Note: these 'words' (valid or invalid) are all the permutations of the word fecit. These words are obtained by scrambling the letters in fecit.