isnae sinae insae nisae sniae nsiae isane siane iasne aisne saine asine inase niase ianse ainse naise anise snaie nsaie sanie asnie nasie ansie isnea sinea insea nisea sniea nsiea isena siena iesna eisna seina esina inesa niesa iensa einsa neisa enisa sneia nseia senia esnia nesia ensia isaen siaen iasen aisen saien asien isean siean iesan eisan seian esian iaesn aiesn ieasn eiasn aeisn eaisn saein asein seain esain aesin easin inaes niaes ianes aines naies anies ineas nieas ienas einas neias enias iaens aiens ieans eians aeins eains naeis aneis neais enais aenis eanis snaei nsaei sanei asnei nasei ansei sneai nseai senai esnai nesai ensai saeni aseni seani esani aesni easni naesi anesi neasi enasi aensi eansi
Note: these 'words' (valid or invalid) are all the permutations of the word isnae. These words are obtained by scrambling the letters in isnae.