fff ffk ffl ffn ffs ffu fkf fkk fkl flf fll fln fls flu fnf fnk fnl fnn fns fnu fsf fsk fsl fsn fss fsu fuf fuk ful fun fus fuu kff kfs kfu kkk kkl kkn kks kku kl- klf kls klu kn- knf knk knl knn knu ksf ksk ksl ksn kss ksu kuk kul kun kus kuu lff lfk lfl lfn lfs lfu lkl lks llf llk lll lln lls llu lnk lnl lnn lns lnu lsf lsk lsl lsn lss lsu luf luk lul lun lus luu nff nfk nfl nfn nfs nfu nkf nkk nkn nks nku nlf nlk nll nln nls nlu nnf nnk nnl nnn nns nnu nsf nsk nsl nsn nss nsu nuk nul nun nus nuu sff sfk sfl sfn sfs sfu sk- skf skk skl sks sku slf slk sll sln sls slu snf snk snl snn sns snu ss- ssf ssk ssl ssn sss ssu suf suk sul sun sus suu uff ufl ufn ufs ufu ukf ukk ukl ukn uku ulf ulk ull uln uls ulu un- unf unk unl unn uns unu usf usk usl usn uss usu uun uus uuu