-ol bbb bbi bbk bbl bbo bbs bbt bi- bib bii bik bil bio bis bit biv bkb bkk bkl bko bks bkt bkv blb bli blk bll blo bls blt blv bob boi bok bol boo bos bot bov bsb bsi bsk bsl bso bss bst bsv btb bti btk btl bto bts btt btv bvb bvi bvk bvl bvo bvs bvt bvv i-v ibb ibi ibk ibl ibo ibs ibt ibv iib iii iil iio iis iit ikb iki ikk ikl iko iks ikt ikv il- ilb ili ilk ill ilo ils ilt ilv io- iob ioi iol ioo ios iot iov is- isb isi isk isl iso iss ist isv itb iti itk itl ito its itt itv ivb ivi ivl ivo ivs ivt ivv k-t kbb kbi kbk kbl kbo kbs kib kii kik kil kio kis kit kiv kkb kki kkk kkl kks kkt kkv kl- klb kli klo kls klt klv kob koi kok kol koo kos kot ksb ksi ksk ksl kso kss kst ksv ktb ktk ktl kto kts ktt ktv kvb kvi kvk kvo kvs kvv lbb lbi lbk lbl lbo lbs lbt lbv lib lii lik lil lio lis lit liv lkb lkl lks lkt llb lli llk lll llo lls llt llv lob loi lok lol loo los lot lov lsb lsi lsk lsl lso lss lst lsv ltb lti ltk ltl lto lts ltt ltv lvb lvi lvl lvs lvt lvv o-i ob- obb obi obk obl obo obs obt obv oib oii oik oil oio ois oit oiv okb oki okk okl oko oks olb oli olk oll olo ols olt oo- oob ooi ook ool ooo oos oot oov os- osb osi osk osl oso oss ost osv ot- otb oti otk otl oto ots ott otv ov- ovb ovi ovl ovo ovs ovv sbb sbi sbk sbl sbo sbs sbt sbv sib sii sik sil sio sis sit siv sk- skb ski skk skl sko sks skt slb sli slk sll slo sls slt slv sob soi sok sol soo sos sot sov ss- ssb ssi ssk ssl sso sss sst ssv stb sti stk stl sto sts stt stv svb svi svk svl svo svs svt svv tbb tbi tbk tbl tbo tbs tbt tbv tib tii tik til tio tis tit tiv tkb tkk tkl tko tks tkt tli tlk tll tlo tls tlt tlv to- tob toi tok tol too tos tot tov tsb tsi tsk tsl tso tss tst tsv ttb tti ttk ttl tto tts ttt ttv tvb tvi tvk tvl tvo tvs tvt vbi vbk vbl vbo vbs vbv vi- vib vii vik vil vio vis vit viv vkb vkt vl- vlb vlk vll vlo vls vlt vlv vob voi vok vol voo vos vot vov vsb vsi vsk vsl vso vss vst vsv vtb vti vtk vtl vto vts vtt vtv vvb vvi vvo vvs vvt vvv