mestc emstc msetc smetc esmtc semtc metsc emtsc mtesc tmesc etmsc temsc mstec smtec mtsec tmsec stmec tsmec estmc setmc etsmc tesmc stemc tsemc mesct emsct msect smect esmct semct mecst emcst mcest cmest ecmst cemst mscet smcet mcset cmset scmet csmet escmt secmt ecsmt cesmt scemt csemt metcs emtcs mtecs tmecs etmcs temcs mects emcts mcets cmets ecmts cemts mtces tmces mctes cmtes tcmes ctmes etcms tecms ectms cetms tcems ctems mstce smtce mtsce tmsce stmce tsmce mscte smcte mcste cmste scmte csmte mtcse tmcse mctse cmtse tcmse ctmse stcme tscme sctme cstme tcsme ctsme estcm setcm etscm tescm stecm tsecm esctm sectm ecstm cestm scetm csetm etcsm tecsm ectsm cetsm tcesm ctesm stcem tscem sctem cstem tcsem ctsem
Note: these 'words' (valid or invalid) are all the permutations of the word mestc. These words are obtained by scrambling the letters in mestc.