chacks hcacks cahcks achcks haccks ahccks chcaks hccaks cchaks cchaks hccaks chcaks cachks acchks ccahks ccahks acchks cachks haccks ahccks hcacks chacks achcks cahcks chakcs hcakcs cahkcs achkcs hackcs ahckcs chkacs hckacs ckhacs kchacs hkcacs khcacs cakhcs ackhcs ckahcs kcahcs akchcs kachcs hakccs ahkccs hkaccs khaccs akhccs kahccs chckas hcckas cchkas cchkas hcckas chckas chkcas hckcas ckhcas kchcas hkccas khccas cckhas cckhas ckchas kcchas ckchas kcchas hckcas chkcas hkccas khccas ckhcas kchcas cackhs acckhs ccakhs ccakhs acckhs cackhs cakchs ackchs ckachs kcachs akcchs kacchs cckahs cckahs ckcahs kccahs ckcahs kccahs ackchs cakchs akcchs kacchs ckachs kcachs hackcs ahckcs hcakcs chakcs achkcs cahkcs hakccs ahkccs hkaccs khaccs akhccs kahccs hckacs chkacs hkcacs khcacs ckhacs kchacs ackhcs cakhcs akchcs kachcs ckahcs kcahcs chacsk hcacsk cahcsk achcsk haccsk ahccsk chcask hccask cchask cchask hccask chcask cachsk acchsk ccahsk ccahsk acchsk cachsk haccsk ahccsk hcacsk chacsk achcsk cahcsk chasck hcasck cahsck achsck hacsck ahcsck chsack hcsack cshack schack hscack shcack cashck acshck csahck scahck aschck sachck hascck ahscck hsacck shacck ashcck sahcck chcsak hccsak cchsak cchsak hccsak chcsak chscak hcscak cshcak schcak hsccak shccak ccshak ccshak cschak scchak cschak scchak hcscak chscak hsccak shccak cshcak schcak cacshk accshk ccashk ccashk accshk cacshk caschk acschk csachk scachk ascchk sacchk ccsahk ccsahk cscahk sccahk cscahk sccahk acschk caschk ascchk sacchk csachk scachk hacsck ahcsck hcasck chasck achsck cahsck hascck ahscck hsacck shacck ashcck sahcck hcsack chsack hscack shcack cshack schack acshck cashck aschck sachck csahck scahck chaksc hcaksc cahksc achksc hacksc ahcksc chkasc hckasc ckhasc kchasc hkcasc khcasc cakhsc ackhsc ckahsc kcahsc akchsc kachsc hakcsc ahkcsc hkacsc khacsc akhcsc kahcsc chaskc hcaskc cahskc achskc hacskc ahcskc chsakc hcsakc cshakc schakc hscakc shcakc cashkc acshkc csahkc scahkc aschkc sachkc hasckc ahsckc hsackc shackc ashckc sahckc chksac hcksac ckhsac kchsac hkcsac khcsac chskac hcskac cshkac schkac hsckac shckac ckshac kcshac cskhac sckhac kschac skchac hkscac khscac hskcac shkcac kshcac skhcac cakshc ackshc ckashc kcashc akcshc kacshc caskhc acskhc csakhc scakhc asckhc sackhc cksahc kcsahc cskahc sckahc kscahc skcahc akschc kaschc askchc sakchc ksachc skachc hakscc ahkscc hkascc khascc akhscc kahscc haskcc ahskcc hsakcc shakcc ashkcc sahkcc hksacc khsacc hskacc shkacc kshacc skhacc akshcc kashcc askhcc sakhcc ksahcc skahcc chcksa hccksa cchksa cchksa hccksa chcksa chkcsa hckcsa ckhcsa kchcsa hkccsa khccsa cckhsa cckhsa ckchsa kcchsa ckchsa kcchsa hckcsa chkcsa hkccsa khccsa ckhcsa kchcsa chcska hccska cchska cchska hccska chcska chscka hcscka cshcka schcka hsccka shccka ccshka ccshka cschka scchka cschka scchka hcscka chscka hsccka shccka cshcka schcka chksca hcksca ckhsca kchsca hkcsca khcsca chskca hcskca cshkca schkca hsckca shckca ckshca kcshca cskhca sckhca kschca skchca hkscca khscca hskcca shkcca kshcca skhcca ccksha ccksha ckcsha kccsha ckcsha kccsha ccskha ccskha csckha scckha csckha scckha ckscha kcscha cskcha sckcha ksccha skccha ckscha kcscha cskcha sckcha ksccha skccha hcksca chksca hkcsca khcsca ckhsca kchsca hcskca chskca hsckca shckca cshkca schkca hkscca khscca hskcca shkcca kshcca skhcca ckshca kcshca cskhca sckhca kschca skchca cacksh accksh ccaksh ccaksh accksh cacksh cakcsh ackcsh ckacsh kcacsh akccsh kaccsh cckash cckash ckcash kccash ckcash kccash ackcsh cakcsh akccsh kaccsh ckacsh kcacsh cacskh accskh ccaskh ccaskh accskh cacskh casckh acsckh csackh scackh ascckh sacckh ccsakh ccsakh cscakh sccakh cscakh sccakh acsckh casckh ascckh sacckh csackh scackh caksch acksch ckasch kcasch akcsch kacsch caskch acskch csakch scakch asckch sackch cksach kcsach cskach sckach kscach skcach akscch kascch askcch sakcch ksacch skacch ccksah ccksah ckcsah kccsah ckcsah kccsah ccskah ccskah csckah scckah csckah scckah ckscah kcscah cskcah sckcah ksccah skccah ckscah kcscah cskcah sckcah ksccah skccah acksch caksch akcsch kacsch ckasch kcasch acskch caskch asckch sackch csakch scakch akscch kascch askcch sakcch ksacch skacch cksach kcsach cskach sckach kscach skcach hacksc ahcksc hcaksc chaksc achksc cahksc hakcsc ahkcsc hkacsc khacsc akhcsc kahcsc hckasc chkasc hkcasc khcasc ckhasc kchasc ackhsc cakhsc akchsc kachsc ckahsc kcahsc hacskc ahcskc hcaskc chaskc achskc cahskc hasckc ahsckc hsackc shackc ashckc sahckc hcsakc chsakc hscakc shcakc cshakc schakc acshkc cashkc aschkc sachkc csahkc scahkc hakscc ahkscc hkascc khascc akhscc kahscc haskcc ahskcc hsakcc shakcc ashkcc sahkcc hksacc khsacc hskacc shkacc kshacc skhacc akshcc kashcc askhcc sakhcc ksahcc skahcc hcksac chksac hkcsac khcsac ckhsac kchsac hcskac chskac hsckac shckac cshkac schkac hkscac khscac hskcac shkcac kshcac skhcac ckshac kcshac cskhac sckhac kschac skchac ackshc cakshc akcshc kacshc ckashc kcashc acskhc caskhc asckhc sackhc csakhc scakhc akschc kaschc askchc sakchc ksachc skachc cksahc kcsahc cskahc sckahc kscahc skcahc
Note: these 'words' (valid or invalid) are all the permutations of the word chacks. These words are obtained by scrambling the letters in chacks.