cuabs ucabs caubs acubs uacbs aucbs cubas ucbas cbuas bcuas ubcas bucas cabus acbus cbaus bcaus abcus bacus uabcs aubcs ubacs buacs abucs baucs cuasb ucasb causb acusb uacsb aucsb cusab ucsab csuab scuab uscab sucab casub acsub csaub scaub ascub sacub uascb auscb usacb suacb asucb saucb cubsa ucbsa cbusa bcusa ubcsa bucsa cusba ucsba csuba scuba uscba sucba cbsua bcsua csbua scbua bscua sbcua ubsca busca usbca subca bsuca sbuca cabsu acbsu cbasu bcasu abcsu bacsu casbu acsbu csabu scabu ascbu sacbu cbsau bcsau csbau scbau bscau sbcau abscu bascu asbcu sabcu bsacu sbacu uabsc aubsc ubasc buasc abusc bausc uasbc ausbc usabc suabc asubc saubc ubsac busac usbac subac bsuac sbuac absuc basuc asbuc sabuc bsauc sbauc
Note: these 'words' (valid or invalid) are all the permutations of the word cuabs. These words are obtained by scrambling the letters in cuabs.