gucks ugcks gcuks cguks ucgks cugks gukcs ugkcs gkucs kgucs ukgcs kugcs gckus cgkus gkcus kgcus ckgus kcgus uckgs cukgs ukcgs kucgs ckugs kcugs gucsk ugcsk gcusk cgusk ucgsk cugsk gusck ugsck gsuck sguck usgck sugck gcsuk cgsuk gscuk sgcuk csguk scguk ucsgk cusgk uscgk sucgk csugk scugk guksc ugksc gkusc kgusc ukgsc kugsc guskc ugskc gsukc sgukc usgkc sugkc gksuc kgsuc gskuc sgkuc ksguc skguc uksgc kusgc uskgc sukgc ksugc skugc gcksu cgksu gkcsu kgcsu ckgsu kcgsu gcsku cgsku gscku sgcku csgku scgku gkscu kgscu gskcu sgkcu ksgcu skgcu cksgu kcsgu cskgu sckgu kscgu skcgu ucksg cuksg ukcsg kucsg ckusg kcusg ucskg cuskg usckg suckg csukg scukg ukscg kuscg uskcg sukcg ksucg skucg cksug kcsug cskug sckug kscug skcug
Note: these 'words' (valid or invalid) are all the permutations of the word gucks. These words are obtained by scrambling the letters in gucks.