efind feind eifnd iefnd fiend ifend efnid fenid enfid nefid fneid nfeid einfd ienfd enifd neifd inefd niefd fined ifned fnied nfied infed nifed efidn feidn eifdn iefdn fiedn ifedn efdin fedin edfin defin fdein dfein eidfn iedfn edifn deifn idefn diefn fiden ifden fdien dfien idfen difen efndi fendi enfdi nefdi fnedi nfedi efdni fedni edfni defni fdeni dfeni endfi nedfi ednfi denfi ndefi dnefi fndei nfdei fdnei dfnei ndfei dnfei eindf iendf enidf neidf inedf niedf eidnf iednf edinf deinf idenf dienf endif nedif ednif denif ndeif dneif indef nidef idnef dinef ndief dnief finde ifnde fnide nfide infde nifde fidne ifdne fdine dfine idfne difne fndie nfdie fdnie dfnie ndfie dnfie indfe nidfe idnfe dinfe ndife dnife
Note: these 'words' (valid or invalid) are all the permutations of the word efind. These words are obtained by scrambling the letters in efind.