bents ebnts bnets nbets enbts nebts betns ebtns btens tbens etbns tebns bntes nbtes btnes tbnes ntbes tnbes entbs netbs etnbs tenbs ntebs tnebs benst ebnst bnest nbest enbst nebst besnt ebsnt bsent sbent esbnt sebnt bnset nbset bsnet sbnet nsbet snbet ensbt nesbt esnbt senbt nsebt snebt betsn ebtsn btesn tbesn etbsn tebsn bestn ebstn bsetn sbetn esbtn sebtn btsen tbsen bsten sbten tsben stben etsbn tesbn estbn setbn tsebn stebn bntse nbtse btnse tbnse ntbse tnbse bnste nbste bsnte sbnte nsbte snbte btsne tbsne bstne sbtne tsbne stbne ntsbe tnsbe nstbe sntbe tsnbe stnbe entsb netsb etnsb tensb ntesb tnesb enstb nestb esntb sentb nsetb snetb etsnb tesnb estnb setnb tsenb stenb ntseb tnseb nsteb snteb tsneb stneb
Note: these 'words' (valid or invalid) are all the permutations of the word bents. These words are obtained by scrambling the letters in bents.