betid ebtid bteid tbeid etbid tebid beitd ebitd bietd ibetd eibtd iebtd btied tbied bited ibted tibed itbed etibd teibd eitbd ietbd tiebd itebd betdi ebtdi btedi tbedi etbdi tebdi bedti ebdti bdeti dbeti edbti debti btdei tbdei bdtei dbtei tdbei dtbei etdbi tedbi edtbi detbi tdebi dtebi beidt ebidt biedt ibedt eibdt iebdt bedit ebdit bdeit dbeit edbit debit bidet ibdet bdiet dbiet idbet dibet eidbt iedbt edibt deibt idebt diebt btide tbide bitde ibtde tibde itbde btdie tbdie bdtie dbtie tdbie dtbie bidte ibdte bdite dbite idbte dibte tidbe itdbe tdibe dtibe idtbe ditbe etidb teidb eitdb ietdb tiedb itedb etdib tedib edtib detib tdeib dteib eidtb iedtb editb deitb idetb dietb tideb itdeb tdieb dtieb idteb diteb
Note: these 'words' (valid or invalid) are all the permutations of the word betid. These words are obtained by scrambling the letters in betid.