tcboe ctboe tbcoe btcoe cbtoe bctoe tcobe ctobe tocbe otcbe cotbe octbe tboce btoce tobce otbce botce obtce cbote bcote cobte ocbte bocte obcte tcbeo ctbeo tbceo btceo cbteo bcteo tcebo ctebo tecbo etcbo cetbo ectbo tbeco bteco tebco etbco betco ebtco cbeto bceto cebto ecbto becto ebcto tcoeb ctoeb toceb otceb coteb octeb tceob cteob tecob etcob cetob ectob toecb otecb teocb etocb oetcb eotcb coetb ocetb ceotb ecotb oectb eoctb tboec btoec tobec otbec botec obtec tbeoc bteoc teboc etboc betoc ebtoc toebc otebc teobc etobc oetbc eotbc boetc obetc beotc ebotc oebtc eobtc cboet bcoet cobet ocbet bocet obcet cbeot bceot cebot ecbot becot ebcot coebt ocebt ceobt ecobt oecbt eocbt boect obect beoct eboct oebct eobct
Note: these 'words' (valid or invalid) are all the permutations of the word tcboe. These words are obtained by scrambling the letters in tcboe.