polks oplks ploks lpoks olpks lopks pokls opkls pkols kpols okpls kopls plkos lpkos pklos kplos lkpos klpos olkps lokps oklps kolps lkops klops polsk oplsk plosk lposk olpsk lopsk poslk opslk psolk spolk osplk soplk plsok lpsok pslok splok lspok slpok olspk lospk oslpk solpk lsopk slopk poksl opksl pkosl kposl okpsl kopsl poskl opskl psokl spokl ospkl sopkl pksol kpsol pskol spkol kspol skpol okspl kospl oskpl sokpl ksopl skopl plkso lpkso pklso kplso lkpso klpso plsko lpsko pslko splko lspko slpko pkslo kpslo psklo spklo ksplo skplo lkspo klspo lskpo slkpo kslpo sklpo olksp loksp oklsp kolsp lkosp klosp olskp loskp oslkp solkp lsokp slokp okslp koslp osklp soklp ksolp skolp lksop klsop lskop slkop kslop sklop
Note: these 'words' (valid or invalid) are all the permutations of the word polks. These words are obtained by scrambling the letters in polks.