pines ipnes pnies npies inpes nipes piens ipens peins epins iepns eipns pneis npeis penis epnis nepis enpis ineps nieps ienps einps neips enips pinse ipnse pnise npise inpse nipse pisne ipsne psine spine ispne sipne pnsie npsie psnie spnie nspie snpie inspe nispe isnpe sinpe nsipe snipe piesn ipesn peisn episn iepsn eipsn pisen ipsen psien spien ispen sipen pesin epsin psein spein espin sepin iespn eispn isepn siepn esipn seipn pnesi npesi pensi epnsi nepsi enpsi pnsei npsei psnei spnei nspei snpei pesni epsni pseni speni espni sepni nespi enspi nsepi snepi esnpi senpi inesp niesp iensp einsp neisp enisp insep nisep isnep sinep nsiep sniep iesnp eisnp isenp sienp esinp seinp nesip ensip nseip sneip esnip senip
Note: these 'words' (valid or invalid) are all the permutations of the word pines. These words are obtained by scrambling the letters in pines.