pents epnts pnets npets enpts nepts petns eptns ptens tpens etpns tepns pntes nptes ptnes tpnes ntpes tnpes entps netps etnps tenps nteps tneps penst epnst pnest npest enpst nepst pesnt epsnt psent spent espnt sepnt pnset npset psnet spnet nspet snpet enspt nespt esnpt senpt nsept snept petsn eptsn ptesn tpesn etpsn tepsn pestn epstn psetn spetn esptn septn ptsen tpsen psten spten tspen stpen etspn tespn estpn setpn tsepn stepn pntse nptse ptnse tpnse ntpse tnpse pnste npste psnte spnte nspte snpte ptsne tpsne pstne sptne tspne stpne ntspe tnspe nstpe sntpe tsnpe stnpe entsp netsp etnsp tensp ntesp tnesp enstp nestp esntp sentp nsetp snetp etsnp tesnp estnp setnp tsenp stenp ntsep tnsep nstep sntep tsnep stnep
Note: these 'words' (valid or invalid) are all the permutations of the word pents. These words are obtained by scrambling the letters in pents.