hucks uhcks hcuks chuks uchks cuhks hukcs uhkcs hkucs khucs ukhcs kuhcs hckus chkus hkcus khcus ckhus kchus uckhs cukhs ukchs kuchs ckuhs kcuhs hucsk uhcsk hcusk chusk uchsk cuhsk husck uhsck hsuck shuck ushck suhck hcsuk chsuk hscuk shcuk cshuk schuk ucshk cushk uschk suchk csuhk scuhk huksc uhksc hkusc khusc ukhsc kuhsc huskc uhskc hsukc shukc ushkc suhkc hksuc khsuc hskuc shkuc kshuc skhuc ukshc kushc uskhc sukhc ksuhc skuhc hcksu chksu hkcsu khcsu ckhsu kchsu hcsku chsku hscku shcku cshku schku hkscu khscu hskcu shkcu kshcu skhcu ckshu kcshu cskhu sckhu kschu skchu ucksh cuksh ukcsh kucsh ckush kcush ucskh cuskh usckh suckh csukh scukh uksch kusch uskch sukch ksuch skuch cksuh kcsuh cskuh sckuh kscuh skcuh
Note: these 'words' (valid or invalid) are all the permutations of the word hucks. These words are obtained by scrambling the letters in hucks.