cubic ucbic cbuic bcuic ubcic bucic cuibc ucibc ciubc icubc uicbc iucbc cbiuc bciuc cibuc icbuc bicuc ibcuc ubicc buicc uibcc iubcc biucc ibucc cubci ucbci cbuci bcuci ubcci bucci cucbi uccbi ccubi ccubi uccbi cucbi cbcui bccui ccbui ccbui bccui cbcui ubcci bucci ucbci cubci bcuci cbuci cuicb ucicb ciucb icucb uiccb iuccb cucib uccib ccuib ccuib uccib cucib cicub iccub cciub cciub iccub cicub uiccb iuccb ucicb cuicb icucb ciucb cbicu bcicu cibcu icbcu biccu ibccu cbciu bcciu ccbiu ccbiu bcciu cbciu cicbu iccbu ccibu ccibu iccbu cicbu biccu ibccu bcicu cbicu icbcu cibcu ubicc buicc uibcc iubcc biucc ibucc ubcic bucic ucbic cubic bcuic cbuic uicbc iucbc ucibc cuibc icubc ciubc bicuc ibcuc bciuc cbiuc icbuc cibuc
Note: these 'words' (valid or invalid) are all the permutations of the word cubic. These words are obtained by scrambling the letters in cubic.