nietp inetp neitp enitp ientp eintp nitep intep ntiep tniep itnep tinep netip entip nteip tneip etnip tenip ietnp eitnp itenp tienp etinp teinp niept inept neipt enipt ienpt einpt nipet inpet npiet pniet ipnet pinet nepit enpit npeit pneit epnit penit iepnt eipnt ipent pient epint peint nitpe intpe ntipe tnipe itnpe tinpe nipte inpte npite pnite ipnte pinte ntpie tnpie nptie pntie tpnie ptnie itpne tipne iptne pitne tpine ptine netpi entpi ntepi tnepi etnpi tenpi nepti enpti npeti pneti epnti penti ntpei tnpei nptei pntei tpnei ptnei etpni tepni eptni petni tpeni pteni ietpn eitpn itepn tiepn etipn teipn ieptn eiptn ipetn pietn epitn peitn itpen tipen ipten piten tpien ptien etpin tepin eptin petin tpein ptein
Note: these 'words' (valid or invalid) are all the permutations of the word nietp. These words are obtained by scrambling the letters in nietp.