-ly -ol fff ffk ffl ffo ffs ffy fkf fkk fkl flf fll flo fls fly fof fok fol foo fos foy fsf fsk fsl fso fss fy- fyk fyo kff kfo kfs kkk kkl kks kky kl- klf klo kls kly kof kok kol koo kos koy ksf ksk ksl kso kss kyl kyo kys lff lfk lfl lfo lfs lkl lks lky llf llk lll llo lls lly lof lok lol loo los loy lsf lsk lsl lso lss lyf lyk lyl lyo lys of- off ofl ofo ofs okk okl oko oks olf olk oll olo ols oly oo- oof ook ool ooo oos os- osf osk osl oso oss oyl oyo oys sff sfk sfl sfo sfs sk- skf skk skl sko sks sky slf slk sll slo sls sly sof sok sol soo sos soy ss- ssf ssk ssl sso sss sy- syk syl sys yff yfs ykk ylk yll yls yly yof yok yol yoo yos yoy ysk ysl yso yss ysy yyf yys yyy