therm hterm tehrm ethrm hetrm ehtrm threm htrem trhem rthem hrtem rhtem terhm etrhm trehm rtehm erthm rethm hertm ehrtm hretm rhetm erhtm rehtm themr htemr tehmr ethmr hetmr ehtmr thmer htmer tmher mther hmter mhter temhr etmhr tmehr mtehr emthr methr hemtr ehmtr hmetr mhetr emhtr mehtr thrme htrme trhme rthme hrtme rhtme thmre htmre tmhre mthre hmtre mhtre trmhe rtmhe tmrhe mtrhe rmthe mrthe hrmte rhmte hmrte mhrte rmhte mrhte termh etrmh tremh rtemh ertmh retmh temrh etmrh tmerh mterh emtrh metrh trmeh rtmeh tmreh mtreh rmteh mrteh ermth remth emrth merth rmeth mreth hermt ehrmt hremt rhemt erhmt rehmt hemrt ehmrt hmert mhert emhrt mehrt hrmet rhmet hmret mhret rmhet mrhet ermht remht emrht merht rmeht mreht
Note: these 'words' (valid or invalid) are all the permutations of the word therm. These words are obtained by scrambling the letters in therm.