sceep cseep secep escep cesep ecsep sceep cseep secep escep cesep ecsep seecp esecp seecp esecp eescp eescp ceesp ecesp ceesp ecesp eecsp eecsp scepe csepe secpe escpe cespe ecspe scpee cspee spcee pscee cpsee pcsee sepce espce spece psece epsce pesce cepse ecpse cpese pcese epcse pecse scepe csepe secpe escpe cespe ecspe scpee cspee spcee pscee cpsee pcsee sepce espce spece psece epsce pesce cepse ecpse cpese pcese epcse pecse seepc esepc seepc esepc eespc eespc sepec espec speec pseec epsec pesec sepec espec speec pseec epsec pesec eepsc eepsc epesc peesc epesc peesc ceeps eceps ceeps eceps eecps eecps cepes ecpes cpees pcees epces peces cepes ecpes cpees pcees epces peces eepcs eepcs epecs peecs epecs peecs
Note: these 'words' (valid or invalid) are all the permutations of the word sceep. These words are obtained by scrambling the letters in sceep.