denis ednis dneis ndeis endis nedis deins edins diens idens eidns iedns dnies ndies dines idnes nides indes enids neids einds iends nieds ineds densi ednsi dnesi ndesi endsi nedsi desni edsni dseni sdeni esdni sedni dnsei ndsei dsnei sdnei nsdei sndei ensdi nesdi esndi sendi nsedi snedi deisn edisn diesn idesn eidsn iedsn desin edsin dsein sdein esdin sedin disen idsen dsien sdien isden siden eisdn iesdn esidn seidn isedn siedn dnise ndise dinse idnse nidse indse dnsie ndsie dsnie sdnie nsdie sndie disne idsne dsine sdine isdne sidne nisde insde nside snide isnde sinde enisd neisd einsd iensd niesd inesd ensid nesid esnid senid nseid sneid eisnd iesnd esind seind isend siend nised insed nsied snied isned sined
Note: these 'words' (valid or invalid) are all the permutations of the word denis. These words are obtained by scrambling the letters in denis.