nufes unfes nfues fnues ufnes funes nuefs unefs neufs enufs uenfs eunfs nfeus fneus nefus enfus fenus efnus ufens fuens uefns eufns feuns efuns nufse unfse nfuse fnuse ufnse funse nusfe unsfe nsufe snufe usnfe sunfe nfsue fnsue nsfue snfue fsnue sfnue ufsne fusne usfne sufne fsune sfune nuesf unesf neusf enusf uensf eunsf nusef unsef nsuef snuef usnef sunef nesuf ensuf nseuf sneuf esnuf senuf uesnf eusnf usenf suenf esunf seunf nfesu fnesu nefsu enfsu fensu efnsu nfseu fnseu nsfeu snfeu fsneu sfneu nesfu ensfu nsefu snefu esnfu senfu fesnu efsnu fsenu sfenu esfnu sefnu ufesn fuesn uefsn eufsn feusn efusn ufsen fusen usfen sufen fsuen sfuen uesfn eusfn usefn suefn esufn seufn fesun efsun fseun sfeun esfun sefun
Note: these 'words' (valid or invalid) are all the permutations of the word nufes. These words are obtained by scrambling the letters in nufes.