nracg rnacg narcg anrcg rancg arncg nrcag rncag ncrag cnrag rcnag crnag nacrg ancrg ncarg cnarg acnrg canrg racng arcng rcang crang acrng carng nragc rnagc nargc anrgc rangc arngc nrgac rngac ngrac gnrac rgnac grnac nagrc angrc ngarc gnarc agnrc ganrc ragnc argnc rganc granc agrnc garnc nrcga rncga ncrga cnrga rcnga crnga nrgca rngca ngrca gnrca rgnca grnca ncgra cngra ngcra gncra cgnra gcnra rcgna crgna rgcna grcna cgrna gcrna nacgr ancgr ncagr cnagr acngr cangr nagcr angcr ngacr gnacr agncr gancr ncgar cngar ngcar gncar cgnar gcnar acgnr cagnr agcnr gacnr cganr gcanr racgn arcgn rcagn cragn acrgn cargn ragcn argcn rgacn gracn agrcn garcn rcgan crgan rgcan grcan cgran gcran acgrn cagrn agcrn gacrn cgarn gcarn
Note: these 'words' (valid or invalid) are all the permutations of the word nracg. These words are obtained by scrambling the letters in nracg.