slacks lsacks salcks aslcks lascks alscks slcaks lscaks sclaks cslaks lcsaks clsaks saclks asclks scalks csalks acslks caslks lacsks alcsks lcasks clasks aclsks calsks slakcs lsakcs salkcs aslkcs laskcs alskcs slkacs lskacs sklacs kslacs lksacs klsacs saklcs asklcs skalcs ksalcs akslcs kaslcs lakscs alkscs lkascs klascs aklscs kalscs slckas lsckas sclkas cslkas lcskas clskas slkcas lskcas sklcas kslcas lkscas klscas scklas csklas skclas ksclas ckslas kcslas lcksas clksas lkcsas klcsas cklsas kclsas sackls asckls scakls csakls acskls caskls sakcls askcls skacls ksacls akscls kascls sckals cskals skcals kscals cksals kcsals acksls caksls akcsls kacsls ckasls kcasls lackss alckss lcakss clakss aclkss calkss lakcss alkcss lkacss klacss aklcss kalcss lckass clkass lkcass klcass cklass kclass acklss caklss akclss kaclss ckalss kcalss slacsk lsacsk salcsk aslcsk lascsk alscsk slcask lscask sclask cslask lcsask clsask saclsk asclsk scalsk csalsk acslsk caslsk lacssk alcssk lcassk classk aclssk calssk slasck lsasck salsck aslsck lassck alssck slsack lssack sslack sslack lssack slsack saslck asslck ssalck ssalck asslck saslck lassck alssck lsasck slasck aslsck salsck slcsak lscsak sclsak cslsak lcssak clssak slscak lsscak sslcak sslcak lsscak slscak scslak csslak ssclak ssclak csslak scslak lcssak clssak lscsak slcsak cslsak sclsak sacslk ascslk scaslk csaslk acsslk casslk sasclk assclk ssaclk ssaclk assclk sasclk scsalk cssalk sscalk sscalk cssalk scsalk acsslk casslk ascslk sacslk csaslk scaslk lacssk alcssk lcassk classk aclssk calssk lascsk alscsk lsacsk slacsk aslcsk salcsk lcsask clsask lscask slcask cslask sclask acslsk caslsk asclsk saclsk csalsk scalsk slaksc lsaksc salksc aslksc lasksc alsksc slkasc lskasc sklasc kslasc lksasc klsasc saklsc asklsc skalsc ksalsc akslsc kaslsc lakssc alkssc lkassc klassc aklssc kalssc slaskc lsaskc salskc aslskc lasskc alsskc slsakc lssakc sslakc sslakc lssakc slsakc saslkc asslkc ssalkc ssalkc asslkc saslkc lasskc alsskc lsaskc slaskc aslskc salskc slksac lsksac sklsac kslsac lkssac klssac slskac lsskac sslkac sslkac lsskac slskac skslac ksslac ssklac ssklac ksslac skslac lkssac klssac lsksac slksac kslsac sklsac sakslc askslc skaslc ksaslc aksslc kasslc sasklc assklc ssaklc ssaklc assklc sasklc sksalc kssalc sskalc sskalc kssalc sksalc aksslc kasslc askslc sakslc ksaslc skaslc lakssc alkssc lkassc klassc aklssc kalssc lasksc alsksc lsaksc slaksc aslksc salksc lksasc klsasc lskasc slkasc kslasc sklasc akslsc kaslsc asklsc saklsc ksalsc skalsc slcksa lscksa sclksa cslksa lcsksa clsksa slkcsa lskcsa sklcsa kslcsa lkscsa klscsa scklsa csklsa skclsa ksclsa ckslsa kcslsa lckssa clkssa lkcssa klcssa cklssa kclssa slcska lscska sclska cslska lcsska clsska slscka lsscka sslcka sslcka lsscka slscka scslka csslka ssclka ssclka csslka scslka lcsska clsska lscska slcska cslska sclska slksca lsksca sklsca kslsca lkssca klssca slskca lsskca sslkca sslkca lsskca slskca skslca ksslca ssklca ssklca ksslca skslca lkssca klssca lsksca slksca kslsca sklsca scksla csksla skcsla kscsla ckssla kcssla scskla csskla ssckla ssckla csskla scskla skscla ksscla sskcla sskcla ksscla skscla ckssla kcssla csksla scksla kscsla skcsla lckssa clkssa lkcssa klcssa cklssa kclssa lcsksa clsksa lscksa slcksa cslksa sclksa lkscsa klscsa lskcsa slkcsa kslcsa sklcsa ckslsa kcslsa csklsa scklsa ksclsa skclsa sacksl ascksl scaksl csaksl acsksl casksl sakcsl askcsl skacsl ksacsl akscsl kascsl sckasl cskasl skcasl kscasl cksasl kcsasl ackssl cakssl akcssl kacssl ckassl kcassl sacskl ascskl scaskl csaskl acsskl casskl sasckl assckl ssackl ssackl assckl sasckl scsakl cssakl sscakl sscakl cssakl scsakl acsskl casskl ascskl sacskl csaskl scaskl sakscl askscl skascl ksascl aksscl kasscl saskcl asskcl ssakcl ssakcl asskcl saskcl sksacl kssacl sskacl sskacl kssacl sksacl aksscl kasscl askscl sakscl ksascl skascl scksal csksal skcsal kscsal ckssal kcssal scskal csskal ssckal ssckal csskal scskal skscal ksscal sskcal sskcal ksscal skscal ckssal kcssal csksal scksal kscsal skcsal ackssl cakssl akcssl kacssl ckassl kcassl acsksl casksl ascksl sacksl csaksl scaksl akscsl kascsl askcsl sakcsl ksacsl skacsl cksasl kcsasl cskasl sckasl kscasl skcasl lackss alckss lcakss clakss aclkss calkss lakcss alkcss lkacss klacss aklcss kalcss lckass clkass lkcass klcass cklass kclass acklss caklss akclss kaclss ckalss kcalss lacsks alcsks lcasks clasks aclsks calsks lascks alscks lsacks slacks aslcks salcks lcsaks clsaks lscaks slcaks cslaks sclaks acslks caslks asclks saclks csalks scalks lakscs alkscs lkascs klascs aklscs kalscs laskcs alskcs lsakcs slakcs aslkcs salkcs lksacs klsacs lskacs slkacs kslacs sklacs akslcs kaslcs asklcs saklcs ksalcs skalcs lcksas clksas lkcsas klcsas cklsas kclsas lcskas clskas lsckas slckas cslkas sclkas lkscas klscas lskcas slkcas kslcas sklcas ckslas kcslas csklas scklas ksclas skclas acksls caksls akcsls kacsls ckasls kcasls acskls caskls asckls sackls csakls scakls akscls kascls askcls sakcls ksacls skacls cksals kcsals cskals sckals kscals skcals
Note: these 'words' (valid or invalid) are all the permutations of the word slacks. These words are obtained by scrambling the letters in slacks.