-ol fff ffk ffl ffo ffr ffs ffu fkf fkk fkl flf fll flo flr fls flu fof fok fol foo for fos fou frf frk frl fro frr frs fru fsf fsk fsl fso fsr fss fsu fuf fuk ful fuo fur fus fuu kff kfo kfs kfu kkk kkl kkr kks kku kl- klf klo klr kls klu kof kok kol koo kor kos kou krf krk krl kro krr krs kru ksf ksk ksl kso ksr kss ksu kuk kul kur kus kuu lff lfk lfl lfo lfr lfs lfu lkl lkr lks llf llk lll llo llr lls llu lof lok lol loo lor los lou lrf lrk lro lrr lrs lru lsf lsk lsl lso lsr lss lsu luf luk lul luo lur lus luu of- off ofl ofo ofr ofs ofu okk okl oko okr oks oku olf olk oll olo ols olu oo- oof ook ool ooo oor oos or- orf ork orl oro orr ors oru os- osf osk osl oso osr oss osu ou- ouf ouk oul ouo our ous rff rfk rfl rfo rfr rfs rfu rkf rkk rko rks rku rlf rll rlo rlr rls rlu rof rok rol roo ror ros rou rrf rrk rrl rrr rrs rru rsf rsk rsl rso rsr rss rsu ruf ruk ruo rur rus ruu sff sfk sfl sfo sfr sfs sfu sk- skf skk skl sko skr sks sku slf slk sll slo slr sls slu sof sok sol soo sor sos sou sr- srf srk srl sro srr srs ss- ssf ssk ssl sso ssr sss ssu suf suk sul suo sur sus suu uff ufl ufo ufr ufs ufu ukf ukk ukl ukr uku ulf ulk ull ulo ulr uls ulu uok uol uoo uor uos ur- urf urk url uro urr urs uru usf usk usl uso usr uss usu uur uus uuu