knurs nkurs kunrs uknrs nukrs unkrs knrus nkrus krnus rknus nrkus rnkus kurns ukrns kruns rkuns urkns rukns nurks unrks nruks rnuks urnks runks knusr nkusr kunsr uknsr nuksr unksr knsur nksur ksnur sknur nskur snkur kusnr uksnr ksunr skunr usknr suknr nuskr unskr nsukr snukr usnkr sunkr knrsu nkrsu krnsu rknsu nrksu rnksu knsru nksru ksnru sknru nskru snkru krsnu rksnu ksrnu skrnu rsknu srknu nrsku rnsku nsrku snrku rsnku srnku kursn ukrsn krusn rkusn urksn ruksn kusrn uksrn ksurn skurn uskrn sukrn krsun rksun ksrun skrun rskun srkun urskn ruskn usrkn surkn rsukn srukn nursk unrsk nrusk rnusk urnsk runsk nusrk unsrk nsurk snurk usnrk sunrk nrsuk rnsuk nsruk snruk rsnuk srnuk ursnk rusnk usrnk surnk rsunk srunk
Note: these 'words' (valid or invalid) are all the permutations of the word knurs. These words are obtained by scrambling the letters in knurs.