ndeep dneep nedep endep denep ednep ndeep dneep nedep endep denep ednep needp enedp needp enedp eendp eendp deenp edenp deenp edenp eednp eednp ndepe dnepe nedpe endpe denpe ednpe ndpee dnpee npdee pndee dpnee pdnee nepde enpde npede pnede epnde pende depne edpne dpene pdene epdne pedne ndepe dnepe nedpe endpe denpe ednpe ndpee dnpee npdee pndee dpnee pdnee nepde enpde npede pnede epnde pende depne edpne dpene pdene epdne pedne neepd enepd neepd enepd eenpd eenpd neped enped npeed pneed epned pened neped enped npeed pneed epned pened eepnd eepnd epend peend epend peend deepn edepn deepn edepn eedpn eedpn depen edpen dpeen pdeen epden peden depen edpen dpeen pdeen epden peden eepdn eepdn epedn peedn epedn peedn
Note: these 'words' (valid or invalid) are all the permutations of the word ndeep. These words are obtained by scrambling the letters in ndeep.