flisk lfisk filsk iflsk lifsk ilfsk flsik lfsik fslik sflik lsfik slfik fislk ifslk fsilk sfilk isflk siflk lisfk ilsfk lsifk slifk islfk silfk fliks lfiks filks iflks lifks ilfks flkis lfkis fklis kflis lkfis klfis fikls ifkls fkils kfils ikfls kifls likfs ilkfs lkifs klifs iklfs kilfs flski lfski fslki sflki lsfki slfki flksi lfksi fklsi kflsi lkfsi klfsi fskli sfkli fksli kfsli skfli ksfli lskfi slkfi lksfi klsfi sklfi kslfi fiskl ifskl fsikl sfikl isfkl sifkl fiksl ifksl fkisl kfisl ikfsl kifsl fskil sfkil fksil kfsil skfil ksfil iskfl sikfl iksfl kisfl skifl ksifl liskf ilskf lsikf slikf islkf silkf liksf ilksf lkisf klisf iklsf kilsf lskif slkif lksif klsif sklif kslif isklf siklf ikslf kislf skilf ksilf
Note: these 'words' (valid or invalid) are all the permutations of the word flisk. These words are obtained by scrambling the letters in flisk.