scark csark sacrk ascrk casrk acsrk scrak csrak srcak rscak crsak rcsak sarck asrck srack rsack arsck rasck carsk acrsk crask rcask arcsk racsk scakr csakr sackr asckr caskr acskr sckar cskar skcar kscar cksar kcsar sakcr askcr skacr ksacr akscr kascr caksr acksr ckasr kcasr akcsr kacsr scrka csrka srcka rscka crska rcska sckra cskra skcra kscra cksra kcsra srkca rskca skrca ksrca rksca krsca crksa rcksa ckrsa kcrsa rkcsa krcsa sarkc asrkc srakc rsakc arskc raskc sakrc askrc skarc ksarc aksrc kasrc srkac rskac skrac ksrac rksac krsac arksc raksc akrsc karsc rkasc krasc carks acrks craks rcaks arcks racks cakrs ackrs ckars kcars akcrs kacrs crkas rckas ckras kcras rkcas krcas arkcs rakcs akrcs karcs rkacs kracs
Note: these 'words' (valid or invalid) are all the permutations of the word scark. These words are obtained by scrambling the letters in scark.