nbtea bntea ntbea tnbea btnea tbnea nbeta bneta nebta enbta benta ebnta nteba tneba netba entba tenba etnba btena tbena betna ebtna tebna etbna nbtae bntae ntbae tnbae btnae tbnae nbate bnate nabte anbte bante abnte ntabe tnabe natbe antbe tanbe atnbe btane tbane batne abtne tabne atbne nbeat bneat nebat enbat benat ebnat nbaet bnaet nabet anbet banet abnet neabt enabt naebt anebt eanbt aenbt beant ebant baent abent eabnt aebnt nteab tneab netab entab tenab etnab ntaeb tnaeb nateb anteb taneb atneb neatb enatb naetb anetb eantb aentb teanb etanb taenb atenb eatnb aetnb btean tbean betan ebtan teban etban btaen tbaen baten abten taben atben beatn ebatn baetn abetn eabtn aebtn teabn etabn taebn atebn eatbn aetbn
Note: these 'words' (valid or invalid) are all the permutations of the word nbtea. These words are obtained by scrambling the letters in nbtea.