shacks hsacks sahcks ashcks hascks ahscks shcaks hscaks schaks cshaks hcsaks chsaks sachks aschks scahks csahks acshks cashks hacsks ahcsks hcasks chasks achsks cahsks shakcs hsakcs sahkcs ashkcs haskcs ahskcs shkacs hskacs skhacs kshacs hksacs khsacs sakhcs askhcs skahcs ksahcs akshcs kashcs hakscs ahkscs hkascs khascs akhscs kahscs shckas hsckas schkas cshkas hcskas chskas shkcas hskcas skhcas kshcas hkscas khscas sckhas cskhas skchas kschas ckshas kcshas hcksas chksas hkcsas khcsas ckhsas kchsas sackhs asckhs scakhs csakhs acskhs caskhs sakchs askchs skachs ksachs akschs kaschs sckahs cskahs skcahs kscahs cksahs kcsahs ackshs cakshs akcshs kacshs ckashs kcashs hackss ahckss hcakss chakss achkss cahkss hakcss ahkcss hkacss khacss akhcss kahcss hckass chkass hkcass khcass ckhass kchass ackhss cakhss akchss kachss ckahss kcahss shacsk hsacsk sahcsk ashcsk hascsk ahscsk shcask hscask schask cshask hcsask chsask sachsk aschsk scahsk csahsk acshsk cashsk hacssk ahcssk hcassk chassk achssk cahssk shasck hsasck sahsck ashsck hassck ahssck shsack hssack sshack sshack hssack shsack sashck asshck ssahck ssahck asshck sashck hassck ahssck hsasck shasck ashsck sahsck shcsak hscsak schsak cshsak hcssak chssak shscak hsscak sshcak sshcak hsscak shscak scshak csshak sschak sschak csshak scshak hcssak chssak hscsak shcsak cshsak schsak sacshk ascshk scashk csashk acsshk casshk saschk asschk ssachk ssachk asschk saschk scsahk cssahk sscahk sscahk cssahk scsahk acsshk casshk ascshk sacshk csashk scashk hacssk ahcssk hcassk chassk achssk cahssk hascsk ahscsk hsacsk shacsk ashcsk sahcsk hcsask chsask hscask shcask cshask schask acshsk cashsk aschsk sachsk csahsk scahsk shaksc hsaksc sahksc ashksc hasksc ahsksc shkasc hskasc skhasc kshasc hksasc khsasc sakhsc askhsc skahsc ksahsc akshsc kashsc hakssc ahkssc hkassc khassc akhssc kahssc shaskc hsaskc sahskc ashskc hasskc ahsskc shsakc hssakc sshakc sshakc hssakc shsakc sashkc asshkc ssahkc ssahkc asshkc sashkc hasskc ahsskc hsaskc shaskc ashskc sahskc shksac hsksac skhsac kshsac hkssac khssac shskac hsskac sshkac sshkac hsskac shskac skshac ksshac sskhac sskhac ksshac skshac hkssac khssac hsksac shksac kshsac skhsac sakshc askshc skashc ksashc aksshc kasshc saskhc asskhc ssakhc ssakhc asskhc saskhc sksahc kssahc sskahc sskahc kssahc sksahc aksshc kasshc askshc sakshc ksashc skashc hakssc ahkssc hkassc khassc akhssc kahssc hasksc ahsksc hsaksc shaksc ashksc sahksc hksasc khsasc hskasc shkasc kshasc skhasc akshsc kashsc askhsc sakhsc ksahsc skahsc shcksa hscksa schksa cshksa hcsksa chsksa shkcsa hskcsa skhcsa kshcsa hkscsa khscsa sckhsa cskhsa skchsa kschsa ckshsa kcshsa hckssa chkssa hkcssa khcssa ckhssa kchssa shcska hscska schska cshska hcsska chsska shscka hsscka sshcka sshcka hsscka shscka scshka csshka sschka sschka csshka scshka hcsska chsska hscska shcska cshska schska shksca hsksca skhsca kshsca hkssca khssca shskca hsskca sshkca sshkca hsskca shskca skshca ksshca sskhca sskhca ksshca skshca hkssca khssca hsksca shksca kshsca skhsca scksha csksha skcsha kscsha ckssha kcssha scskha csskha ssckha ssckha csskha scskha skscha ksscha sskcha sskcha ksscha skscha ckssha kcssha csksha scksha kscsha skcsha hckssa chkssa hkcssa khcssa ckhssa kchssa hcsksa chsksa hscksa shcksa cshksa schksa hkscsa khscsa hskcsa shkcsa kshcsa skhcsa ckshsa kcshsa cskhsa sckhsa kschsa skchsa sacksh ascksh scaksh csaksh acsksh casksh sakcsh askcsh skacsh ksacsh akscsh kascsh sckash cskash skcash kscash cksash kcsash ackssh cakssh akcssh kacssh ckassh kcassh sacskh ascskh scaskh csaskh acsskh casskh sasckh assckh ssackh ssackh assckh sasckh scsakh cssakh sscakh sscakh cssakh scsakh acsskh casskh ascskh sacskh csaskh scaskh saksch asksch skasch ksasch akssch kassch saskch asskch ssakch ssakch asskch saskch sksach kssach sskach sskach kssach sksach akssch kassch asksch saksch ksasch skasch scksah csksah skcsah kscsah ckssah kcssah scskah csskah ssckah ssckah csskah scskah skscah ksscah sskcah sskcah ksscah skscah ckssah kcssah csksah scksah kscsah skcsah ackssh cakssh akcssh kacssh ckassh kcassh acsksh casksh ascksh sacksh csaksh scaksh akscsh kascsh askcsh sakcsh ksacsh skacsh cksash kcsash cskash sckash kscash skcash hackss ahckss hcakss chakss achkss cahkss hakcss ahkcss hkacss khacss akhcss kahcss hckass chkass hkcass khcass ckhass kchass ackhss cakhss akchss kachss ckahss kcahss hacsks ahcsks hcasks chasks achsks cahsks hascks ahscks hsacks shacks ashcks sahcks hcsaks chsaks hscaks shcaks cshaks schaks acshks cashks aschks sachks csahks scahks hakscs ahkscs hkascs khascs akhscs kahscs haskcs ahskcs hsakcs shakcs ashkcs sahkcs hksacs khsacs hskacs shkacs kshacs skhacs akshcs kashcs askhcs sakhcs ksahcs skahcs hcksas chksas hkcsas khcsas ckhsas kchsas hcskas chskas hsckas shckas cshkas schkas hkscas khscas hskcas shkcas kshcas skhcas ckshas kcshas cskhas sckhas kschas skchas ackshs cakshs akcshs kacshs ckashs kcashs acskhs caskhs asckhs sackhs csakhs scakhs akschs kaschs askchs sakchs ksachs skachs cksahs kcsahs cskahs sckahs kscahs skcahs
Note: these 'words' (valid or invalid) are all the permutations of the word shacks. These words are obtained by scrambling the letters in shacks.