-ol bbb bbi bbk bbl bbo bbs bi- bib bii bik bil bio bis biv bkb bkk bkl bko bks bkv blb bli blk bll blo bls blv bob boi bok bol boo bos bov bsb bsi bsk bsl bso bss bsv bvb bvi bvk bvl bvo bvs bvv i-v ibb ibi ibk ibl ibo ibs ibv iib iii iil iio iis ikb iki ikk ikl iko iks ikv il- ilb ili ilk ill ilo ils ilv io- iob ioi iol ioo ios iov is- isb isi isk isl iso iss isv ivb ivi ivl ivo ivs ivv kbb kbi kbk kbl kbo kbs kib kii kik kil kio kis kiv kkb kki kkk kkl kks kkv kl- klb kli klo kls klv kob koi kok kol koo kos ksb ksi ksk ksl kso kss ksv kvb kvi kvk kvo kvs kvv lbb lbi lbk lbl lbo lbs lbv lib lii lik lil lio lis liv lkb lkl lks llb lli llk lll llo lls llv lob loi lok lol loo los lov lsb lsi lsk lsl lso lss lsv lvb lvi lvl lvs lvv o-i ob- obb obi obk obl obo obs obv oib oii oik oil oio ois oiv okb oki okk okl oko oks olb oli olk oll olo ols oo- oob ooi ook ool ooo oos oov os- osb osi osk osl oso oss osv ov- ovb ovi ovl ovo ovs ovv sbb sbi sbk sbl sbo sbs sbv sib sii sik sil sio sis siv sk- skb ski skk skl sko sks slb sli slk sll slo sls slv sob soi sok sol soo sos sov ss- ssb ssi ssk ssl sso sss ssv svb svi svk svl svo svs svv vbi vbk vbl vbo vbs vbv vi- vib vii vik vil vio vis viv vkb vl- vlb vlk vll vlo vls vlv vob voi vok vol voo vos vov vsb vsi vsk vsl vso vss vsv vvb vvi vvo vvs vvv