prink rpink pirnk iprnk ripnk irpnk prnik rpnik pnrik nprik rnpik nrpik pinrk ipnrk pnirk npirk inprk niprk rinpk irnpk rnipk nripk inrpk nirpk prikn rpikn pirkn iprkn ripkn irpkn prkin rpkin pkrin kprin rkpin krpin pikrn ipkrn pkirn kpirn ikprn kiprn rikpn irkpn rkipn kripn ikrpn kirpn prnki rpnki pnrki nprki rnpki nrpki prkni rpkni pkrni kprni rkpni krpni pnkri npkri pknri kpnri nkpri knpri rnkpi nrkpi rknpi krnpi nkrpi knrpi pinkr ipnkr pnikr npikr inpkr nipkr piknr ipknr pkinr kpinr ikpnr kipnr pnkir npkir pknir kpnir nkpir knpir inkpr nikpr iknpr kinpr nkipr knipr rinkp irnkp rnikp nrikp inrkp nirkp riknp irknp rkinp krinp ikrnp kirnp rnkip nrkip rknip krnip nkrip knrip inkrp nikrp iknrp kinrp nkirp knirp
Note: these 'words' (valid or invalid) are all the permutations of the word prink. These words are obtained by scrambling the letters in prink.