sleph lseph selph eslph lesph elsph slpeh lspeh spleh psleh lpseh plseh seplh esplh spelh pselh epslh peslh lepsh elpsh lpesh plesh eplsh pelsh slehp lsehp selhp eslhp leshp elshp slhep lshep shlep hslep lhsep hlsep sehlp eshlp shelp hselp ehslp heslp lehsp elhsp lhesp hlesp ehlsp helsp slphe lsphe splhe pslhe lpshe plshe slhpe lshpe shlpe hslpe lhspe hlspe sphle pshle shple hsple phsle hpsle lphse plhse lhpse hlpse phlse hplse sephl esphl spehl psehl epshl peshl sehpl eshpl shepl hsepl ehspl hespl sphel pshel shpel hspel phsel hpsel ephsl pehsl ehpsl hepsl phesl hpesl lephs elphs lpehs plehs eplhs pelhs lehps elhps lheps hleps ehlps helps lphes plhes lhpes hlpes phles hples ephls pehls ehpls hepls phels hpels
Note: these 'words' (valid or invalid) are all the permutations of the word sleph. These words are obtained by scrambling the letters in sleph.