naped anped npaed pnaed apned paned naepd anepd neapd enapd aenpd eanpd npead pnead nepad enpad penad epnad apend paend aepnd eapnd peand epand napde anpde npade pnade apnde pande nadpe andpe ndape dnape adnpe danpe npdae pndae ndpae dnpae pdnae dpnae apdne padne adpne dapne pdane dpane naedp anedp neadp enadp aendp eandp nadep andep ndaep dnaep adnep danep nedap endap ndeap dneap ednap denap aednp eadnp adenp daenp edanp deanp npeda pneda nepda enpda penda epnda npdea pndea ndpea dnpea pdnea dpnea nedpa endpa ndepa dnepa ednpa denpa pedna epdna pdena dpena edpna depna apedn paedn aepdn eapdn peadn epadn apden paden adpen dapen pdaen dpaen aedpn eadpn adepn daepn edapn deapn pedan epdan pdean dpean edpan depan
Note: these 'words' (valid or invalid) are all the permutations of the word naped. These words are obtained by scrambling the letters in naped.