tweak wteak tewak etwak wetak ewtak twaek wtaek tawek atwek watek awtek teawk etawk taewk atewk eatwk aetwk weatk ewatk waetk awetk eawtk aewtk tweka wteka tewka etwka wetka ewtka twkea wtkea tkwea ktwea wktea kwtea tekwa etkwa tkewa ktewa ektwa ketwa wekta ewkta wketa kweta ekwta kewta twake wtake tawke atwke watke awtke twkae wtkae tkwae ktwae wktae kwtae takwe atkwe tkawe ktawe aktwe katwe wakte awkte wkate kwate akwte kawte teakw etakw taekw atekw eatkw aetkw tekaw etkaw tkeaw kteaw ektaw ketaw takew atkew tkaew ktaew aktew katew eaktw aektw ekatw keatw aketw kaetw weakt ewakt waekt awekt eawkt aewkt wekat ewkat wkeat kweat ekwat kewat waket awket wkaet kwaet akwet kawet eakwt aekwt ekawt keawt akewt kaewt
Note: these 'words' (valid or invalid) are all the permutations of the word tweak. These words are obtained by scrambling the letters in tweak.