letup eltup lteup tleup etlup telup leutp elutp luetp uletp eultp ueltp ltuep tluep lutep ultep tulep utlep etulp teulp eutlp uetlp tuelp utelp letpu eltpu ltepu tlepu etlpu telpu leptu elptu lpetu pletu epltu peltu ltpeu tlpeu lpteu plteu tpleu ptleu etplu teplu eptlu petlu tpelu ptelu leupt elupt luept ulept eulpt uelpt leput elput lpeut pleut eplut pelut lupet ulpet lpuet pluet uplet pulet euplt ueplt epult peult upelt puelt ltupe tlupe lutpe ultpe tulpe utlpe ltpue tlpue lptue pltue tplue ptlue lupte ulpte lpute plute uplte pulte tuple utple tpule ptule uptle putle etupl teupl eutpl uetpl tuepl utepl etpul tepul eptul petul tpeul pteul euptl ueptl eputl peutl upetl puetl tupel utpel tpuel ptuel uptel putel
Note: these 'words' (valid or invalid) are all the permutations of the word letup. These words are obtained by scrambling the letters in letup.