scalk csalk saclk asclk caslk acslk sclak cslak slcak lscak clsak lcsak salck aslck slack lsack alsck lasck calsk aclsk clask lcask alcsk lacsk scakl csakl sackl asckl caskl acskl sckal cskal skcal kscal cksal kcsal sakcl askcl skacl ksacl akscl kascl caksl acksl ckasl kcasl akcsl kacsl sclka cslka slcka lscka clska lcska sckla cskla skcla kscla cksla kcsla slkca lskca sklca kslca lksca klsca clksa lcksa cklsa kclsa lkcsa klcsa salkc aslkc slakc lsakc alskc laskc saklc asklc skalc ksalc akslc kaslc slkac lskac sklac kslac lksac klsac alksc laksc aklsc kalsc lkasc klasc calks aclks claks lcaks alcks lacks cakls ackls ckals kcals akcls kacls clkas lckas cklas kclas lkcas klcas alkcs lakcs aklcs kalcs lkacs klacs
Note: these 'words' (valid or invalid) are all the permutations of the word scalk. These words are obtained by scrambling the letters in scalk.