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