cotwa octwa ctowa tcowa otcwa tocwa cowta ocwta cwota wcota owcta wocta ctwoa tcwoa cwtoa wctoa twcoa wtcoa otwca towca owtca wotca twoca wtoca cotaw octaw ctoaw tcoaw otcaw tocaw coatw ocatw caotw acotw oactw aoctw ctaow tcaow catow actow tacow atcow otacw toacw oatcw aotcw taocw atocw cowat ocwat cwoat wcoat owcat wocat coawt ocawt caowt acowt oacwt aocwt cwaot wcaot cawot acwot wacot awcot owact woact oawct aowct waoct awoct ctwao tcwao cwtao wctao twcao wtcao ctawo tcawo catwo actwo tacwo atcwo cwato wcato cawto acwto wacto awcto twaco wtaco tawco atwco watco awtco otwac towac owtac wotac twoac wtoac otawc toawc oatwc aotwc taowc atowc owatc woatc oawtc aowtc waotc awotc twaoc wtaoc tawoc atwoc watoc awtoc
Note: these 'words' (valid or invalid) are all the permutations of the word cotwa. These words are obtained by scrambling the letters in cotwa.