pecke epcke pceke cpeke ecpke cepke pekce epkce pkece kpece ekpce kepce pckee cpkee pkcee kpcee ckpee kcpee eckpe cekpe ekcpe kecpe ckepe kcepe pecek epcek pceek cpeek ecpek cepek peeck epeck peeck epeck eepck eepck pceek cpeek pecek epcek cepek ecpek ecepk ceepk eecpk eecpk ceepk ecepk pekec epkec pkeec kpeec ekpec kepec peekc epekc peekc epekc eepkc eepkc pkeec kpeec pekec epkec kepec ekpec ekepc keepc eekpc eekpc keepc ekepc pckee cpkee pkcee kpcee ckpee kcpee pceke cpeke pecke epcke cepke ecpke pkece kpece pekce epkce kepce ekpce ckepe kcepe cekpe eckpe kecpe ekcpe eckep cekep ekcep kecep ckeep kceep ecekp ceekp eeckp eeckp ceekp ecekp ekecp keecp eekcp eekcp keecp ekecp ckeep kceep cekep eckep kecep ekcep
Note: these 'words' (valid or invalid) are all the permutations of the word pecke. These words are obtained by scrambling the letters in pecke.