neadc enadc naedc anedc eandc aendc nedac endac ndeac dneac ednac denac nadec andec ndaec dnaec adnec danec eadnc aednc edanc deanc adenc daenc neacd enacd naecd anecd eancd aencd necad encad ncead cnead ecnad cenad naced anced ncaed cnaed acned caned eacnd aecnd ecand ceand acend caend nedca endca ndeca dneca ednca denca necda encda nceda cneda ecnda cenda ndcea dncea ncdea cndea dcnea cdnea edcna decna ecdna cedna dcena cdena nadce andce ndace dnace adnce dance nacde ancde ncade cnade acnde cande ndcae dncae ncdae cndae dcnae cdnae adcne dacne acdne cadne dcane cdane eadcn aedcn edacn deacn adecn daecn eacdn aecdn ecadn ceadn acedn caedn edcan decan ecdan cedan dcean cdean adcen dacen acden caden dcaen cdaen
Note: these 'words' (valid or invalid) are all the permutations of the word neadc. These words are obtained by scrambling the letters in neadc.