uneth nueth uenth eunth neuth enuth unteh nuteh utneh tuneh ntueh tnueh uetnh eutnh utenh tuenh etunh teunh netuh entuh nteuh tneuh etnuh tenuh uneht nueht uenht eunht neuht enuht unhet nuhet uhnet hunet nhuet hnuet uehnt euhnt uhent huent ehunt heunt nehut enhut nheut hneut ehnut henut unthe nuthe utnhe tunhe ntuhe tnuhe unhte nuhte uhnte hunte nhute hnute uthne tuhne uhtne hutne thune htune nthue tnhue nhtue hntue thnue htnue uethn euthn utehn tuehn etuhn teuhn uehtn euhtn uhetn huetn ehutn heutn uthen tuhen uhten huten thuen htuen ethun tehun ehtun hetun theun hteun nethu enthu ntehu tnehu etnhu tenhu nehtu enhtu nhetu hnetu ehntu hentu ntheu tnheu nhteu hnteu thneu htneu ethnu tehnu ehtnu hetnu thenu htenu
Note: these 'words' (valid or invalid) are all the permutations of the word uneth. These words are obtained by scrambling the letters in uneth.