scank csank sacnk ascnk casnk acsnk scnak csnak sncak nscak cnsak ncsak sanck asnck snack nsack ansck nasck cansk acnsk cnask ncask ancsk nacsk scakn csakn sackn asckn caskn acskn sckan cskan skcan kscan cksan kcsan sakcn askcn skacn ksacn akscn kascn caksn acksn ckasn kcasn akcsn kacsn scnka csnka sncka nscka cnska ncska sckna cskna skcna kscna cksna kcsna snkca nskca sknca ksnca nksca knsca cnksa ncksa cknsa kcnsa nkcsa kncsa sankc asnkc snakc nsakc anskc naskc saknc asknc skanc ksanc aksnc kasnc snkac nskac sknac ksnac nksac knsac anksc naksc aknsc kansc nkasc knasc canks acnks cnaks ncaks ancks nacks cakns ackns ckans kcans akcns kacns cnkas nckas cknas kcnas nkcas kncas ankcs nakcs akncs kancs nkacs knacs
Note: these 'words' (valid or invalid) are all the permutations of the word scank. These words are obtained by scrambling the letters in scank.