flute lfute fulte uflte lufte ulfte fltue lftue ftlue tflue ltfue tlfue futle uftle ftule tfule utfle tufle lutfe ultfe ltufe tlufe utlfe tulfe fluet lfuet fulet uflet lufet ulfet fleut lfeut felut eflut lefut elfut fuelt ufelt feult efult ueflt euflt lueft uleft leuft eluft uelft eulft flteu lfteu ftleu tfleu ltfeu tlfeu fletu lfetu feltu efltu leftu elftu ftelu tfelu fetlu eftlu teflu etflu ltefu tlefu letfu eltfu telfu etlfu futel uftel ftuel tfuel utfel tufel fuetl ufetl feutl efutl ueftl euftl fteul tfeul fetul eftul teful etful utefl tuefl uetfl eutfl teufl etufl lutef ultef ltuef tluef utlef tulef luetf uletf leutf elutf ueltf eultf lteuf tleuf letuf eltuf teluf etluf utelf tuelf uetlf eutlf teulf etulf
Note: these 'words' (valid or invalid) are all the permutations of the word flute. These words are obtained by scrambling the letters in flute.