meths emths mtehs tmehs etmhs temhs mehts emhts mhets hmets ehmts hemts mthes tmhes mhtes hmtes thmes htmes ethms tehms ehtms hetms thems htems metsh emtsh mtesh tmesh etmsh temsh mesth emsth mseth smeth esmth semth mtseh tmseh msteh smteh tsmeh stmeh etsmh tesmh estmh setmh tsemh stemh mehst emhst mhest hmest ehmst hemst mesht emsht mseht smeht esmht semht mhset hmset mshet smhet hsmet shmet ehsmt hesmt eshmt sehmt hsemt shemt mthse tmhse mhtse hmtse thmse htmse mtshe tmshe msthe smthe tsmhe stmhe mhste hmste mshte smhte hsmte shmte thsme htsme tshme sthme hstme shtme ethsm tehsm ehtsm hetsm thesm htesm etshm teshm esthm sethm tsehm stehm ehstm hestm eshtm sehtm hsetm shetm thsem htsem tshem sthem hstem shtem
Note: these 'words' (valid or invalid) are all the permutations of the word meths. These words are obtained by scrambling the letters in meths.