-ol bbb bbd bbk bbl bbo bbr bbs bdb bdd bdk bdl bdo bdr bds bdv bkb bkk bkl bko bkr bks bkv blb bld blk bll blo blr bls blv bob bod bok bol boo bor bos bov brb brd brk brl bro brr brs brv bsb bsd bsk bsl bso bsr bss bsv bvb bvd bvk bvl bvo bvr bvs bvv dbb dbd dbk dbl dbo dbr dbs dbv ddb ddd ddk ddl ddo ddr dds dkb dkk dkl dko dkr dks dl- dlb dld dlk dll dlo dlr dls dlv dob dod dok dol doo dor dos dov drb drd drk drl dro drr drs drv dsb dsd dsk dsl dso dsr dss dsv dvb dvd dvk dvl dvr dvs kbb kbd kbk kbl kbo kbr kbs kdb kdk kdl kdo kdr kds kkb kkk kkl kkr kks kkv kl- klb kld klo klr kls klv kob kod kok kol koo kor kos krd krk krl kro krr krs krv ksb ksd ksk ksl kso ksr kss ksv kvb kvk kvo kvr kvs kvv lbb lbd lbk lbl lbo lbr lbs lbv ldb ldd ldk ldl ldo ldr lds ldv lkb lkl lkr lks llb lld llk lll llo llr lls llv lob lod lok lol loo lor los lov lrb lrd lrk lro lrr lrs lrv lsb lsd lsk lsl lso lsr lss lsv lvb lvd lvl lvr lvs lvv ob- obb obd obk obl obo obr obs obv odb odd odl odo odr ods odv okb okd okk okl oko okr oks olb old olk oll olo ols oo- oob ood ook ool ooo oor oos oov or- orb ord ork orl oro orr ors orv os- osb osd osk osl oso osr oss osv ov- ovb ovd ovl ovo ovs ovv rbb rbd rbk rbl rbo rbr rbs rdb rdd rdl rdo rdr rds rdv rkb rkk rko rks rkv rld rll rlo rlr rls rob rod rok rol roo ror ros rov rrb rrd rrk rrl rrr rrs rsb rsd rsk rsl rso rsr rss rsv rvb rvd rvl rvo rvr rvs rvv sbb sbd sbk sbl sbo sbr sbs sbv sdb sdd sdk sdl sdo sdr sds sdv sk- skb skd skk skl sko skr sks slb sld slk sll slo slr sls slv sob sod sok sol soo sor sos sov sr- srb srd srk srl sro srr srs srv ss- ssb ssd ssk ssl sso ssr sss ssv svb svd svk svl svo svr svs svv vbd vbk vbl vbo vbr vbs vbv vdb vdd vdk vdl vdo vdr vds vdv vkb vl- vlb vld vlk vll vlo vls vlv vob vod vok vol voo vor vos vov vrb vrd vrk vrr vrs vsb vsd vsk vsl vso vsr vss vsv vvb vvo vvr vvs vvv