-ol fff ffi ffk ffl ffo ffs fif fii fik fil fis fkf fki fkk fkl flf fli fll flo fls fof foi fok fol foo fos fsf fsi fsk fsl fso fss i-f iff ifi ifl ifo ifs iif iii iil iio iis ikf iki ikk ikl iko iks il- ilf ili ilk ill ilo ils io- iof ioi iol ioo ios is- isf isi isk isl iso iss kff kfi kfo kfs kif kii kik kil kio kis kki kkk kkl kks kl- klf kli klo kls kof koi kok kol koo kos ksf ksi ksk ksl kso kss lff lfi lfk lfl lfo lfs lif lii lik lil lio lis lkl lks llf lli llk lll llo lls lof loi lok lol loo los lsf lsi lsk lsl lso lss o-i of- off ofi ofl ofo ofs oif oii oik oil oio ois oki okk okl oko oks olf oli olk oll olo ols oo- oof ooi ook ool ooo oos os- osf osi osk osl oso oss sff sfi sfk sfl sfo sfs sif sii sik sil sio sis sk- skf ski skk skl sko sks slf sli slk sll slo sls sof soi sok sol soo sos ss- ssf ssi ssk ssl sso sss