cubes ucbes cbues bcues ubces buces cuebs ucebs ceubs ecubs uecbs eucbs cbeus bceus cebus ecbus becus ebcus ubecs buecs uebcs eubcs beucs ebucs cubse ucbse cbuse bcuse ubcse bucse cusbe ucsbe csube scube uscbe sucbe cbsue bcsue csbue scbue bscue sbcue ubsce busce usbce subce bsuce sbuce cuesb ucesb ceusb ecusb uecsb eucsb cuseb ucseb csueb scueb usceb suceb cesub ecsub cseub sceub escub secub uescb euscb usecb suecb esucb seucb cbesu bcesu cebsu ecbsu becsu ebcsu cbseu bcseu csbeu scbeu bsceu sbceu cesbu ecsbu csebu scebu escbu secbu bescu ebscu bsecu sbecu esbcu sebcu ubesc buesc uebsc eubsc beusc ebusc ubsec busec usbec subec bsuec sbuec uesbc eusbc usebc suebc esubc seubc besuc ebsuc bseuc sbeuc esbuc sebuc
Note: these 'words' (valid or invalid) are all the permutations of the word cubes. These words are obtained by scrambling the letters in cubes.