stmoc tsmoc smtoc mstoc tmsoc mtsoc stomc tsomc sotmc ostmc tosmc otsmc smotc msotc somtc osmtc mostc omstc tmosc mtosc tomsc otmsc motsc omtsc stmco tsmco smtco mstco tmsco mtsco stcmo tscmo sctmo cstmo tcsmo ctsmo smcto mscto scmto csmto mcsto cmsto tmcso mtcso tcmso ctmso mctso cmtso stocm tsocm sotcm ostcm toscm otscm stcom tscom sctom cstom tcsom ctsom soctm osctm scotm csotm ocstm costm tocsm otcsm tcosm ctosm octsm cotsm smoct msoct somct osmct mosct omsct smcot mscot scmot csmot mcsot cmsot socmt oscmt scomt csomt ocsmt cosmt mocst omcst mcost cmost ocmst comst tmocs mtocs tomcs otmcs motcs omtcs tmcos mtcos tcmos ctmos mctos cmtos tocms otcms tcoms ctoms octms cotms mocts omcts mcots cmots ocmts comts
Note: these 'words' (valid or invalid) are all the permutations of the word stmoc. These words are obtained by scrambling the letters in stmoc.