eniac neiac einac ienac nieac ineac enaic neaic eanic aenic naeic aneic eianc ieanc eainc aeinc iaenc aienc niaec inaec naiec aniec ianec ainec enica neica einca ienca nieca ineca encia necia ecnia cenia nceia cneia eicna iecna ecina ceina icena ciena nicea incea nciea cniea icnea cinea enaci neaci eanci aenci naeci aneci encai necai ecnai cenai nceai cneai eacni aecni ecani ceani aceni caeni nacei ancei ncaei cnaei acnei canei eiacn ieacn eaicn aeicn iaecn aiecn eican iecan ecian ceian icean ciean eacin aecin ecain ceain acein caein iacen aicen icaen ciaen acien caien niace inace naice anice iance aince nicae incae nciae cniae icnae cinae nacie ancie ncaie cnaie acnie canie iacne aicne icane ciane acine caine
Note: these 'words' (valid or invalid) are all the permutations of the word eniac. These words are obtained by scrambling the letters in eniac.