-ol fff ffi ffk ffl ffo ffs fft fif fii fik fil fis fit fkf fki fkk fkl fkt flf fli fll flo fls flt fof foi fok fol foo fos fot fsf fsi fsk fsl fso fss fst ftf fti ftk ftl fto fts ftt i-f iff ifi ifl ifo ifs ift iif iii iil iio iis iit ikf iki ikk ikl iko iks ikt il- ilf ili ilk ill ilo ils ilt io- iof ioi iol ioo ios iot is- isf isi isk isl iso iss ist itf iti itk itl ito its itt k-t kff kfi kfo kfs kif kii kik kil kio kis kit kki kkk kkl kks kkt kl- klf kli klo kls klt kof koi kok kol koo kos kot ksf ksi ksk ksl kso kss kst ktf ktk ktl kto kts ktt lff lfi lfk lfl lfo lfs lft lif lii lik lil lio lis lit lkl lks lkt llf lli llk lll llo lls llt lof loi lok lol loo los lot lsf lsi lsk lsl lso lss lst ltf lti ltk ltl lto lts ltt o-i of- off ofi ofl ofo ofs oft oif oii oik oil oio ois oit oki okk okl oko oks olf oli olk oll olo ols olt oo- oof ooi ook ool ooo oos oot os- osf osi osk osl oso oss ost ot- otf oti otk otl oto ots ott sff sfi sfk sfl sfo sfs sft sif sii sik sil sio sis sit sk- skf ski skk skl sko sks skt slf sli slk sll slo sls slt sof soi sok sol soo sos sot ss- ssf ssi ssk ssl sso sss sst stf sti stk stl sto sts stt tff tfi tfk tfl tfo tfs tft tif tii tik til tio tis tit tkk tkl tko tks tkt tlf tli tlk tll tlo tls tlt to- tof toi tok tol too tos tot tsf tsi tsk tsl tso tss tst ttf tti ttk ttl tto tts ttt