cubeb ucbeb cbueb bcueb ubceb buceb cuebb ucebb ceubb ecubb uecbb eucbb cbeub bceub cebub ecbub becub ebcub ubecb buecb uebcb eubcb beucb ebucb cubbe ucbbe cbube bcube ubcbe bucbe cubbe ucbbe cbube bcube ubcbe bucbe cbbue bcbue cbbue bcbue bbcue bbcue ubbce bubce ubbce bubce bbuce bbuce cuebb ucebb ceubb ecubb uecbb eucbb cubeb ucbeb cbueb bcueb ubceb buceb cebub ecbub cbeub bceub ebcub becub uebcb eubcb ubecb buecb ebucb beucb cbebu bcebu cebbu ecbbu becbu ebcbu cbbeu bcbeu cbbeu bcbeu bbceu bbceu cebbu ecbbu cbebu bcebu ebcbu becbu bebcu ebbcu bbecu bbecu ebbcu bebcu ubebc buebc uebbc eubbc beubc ebubc ubbec bubec ubbec bubec bbuec bbuec uebbc eubbc ubebc buebc ebubc beubc bebuc ebbuc bbeuc bbeuc ebbuc bebuc
Note: these 'words' (valid or invalid) are all the permutations of the word cubeb. These words are obtained by scrambling the letters in cubeb.