-ol bbb bbh bbk bbl bbo bbr bbs bhb bhh bhk bhl bho bhr bhs bkb bkk bkl bko bkr bks blb blh blk bll blo blr bls bob boh bok bol boo bor bos brb brh brk brl bro brr brs bsb bsh bsk bsl bso bsr bss hbb hbh hbk hbl hbo hbr hbs hhb hhh hhk hhl hho hhr hhs hkb hkh hkk hkl hko hkr hks hlb hlh hll hlo hlr hls hob hoh hok hol hoo hor hos hr- hrb hrh hrk hrl hro hrr hrs hsb hsh hsk hsl hsr hss kbb kbh kbk kbl kbo kbr kbs khh khk kho khr khs kkb kkh kkk kkl kkr kks kl- klb klh klo klr kls kob koh kok kol koo kor kos krk krl kro krr krs ksb ksh ksk ksl kso ksr kss lbb lbh lbk lbl lbo lbr lbs lhb lhh lhk lho lhr lhs lkb lkh lkl lkr lks llb llk lll llo llr lls lob loh lok lol loo lor los lrb lrh lrk lro lrr lrs lsb lsh lsk lsl lso lsr lss ob- obb obh obk obl obo obr obs ohh ohl oho ohr ohs okb okk okl oko okr oks olb olk oll olo ols oo- oob ooh ook ool ooo oor oos or- orb orh ork orl oro orr ors os- osb osh osk osl oso osr oss rbb rbh rbk rbl rbo rbr rbs rh- rhb rhh rhl rho rhr rhs rkb rkk rko rks rlh rll rlo rlr rls rob roh rok rol roo ror ros rrb rrh rrk rrl rrr rrs rsb rsh rsk rsl rso rsr rss sbb sbh sbk sbl sbo sbr sbs sh- shb shh shk shl sho shr shs sk- skb skh skk skl sko skr sks slb slh slk sll slo slr sls sob soh sok sol soo sor sos sr- srb srh srk srl sro srr srs ss- ssb ssh ssk ssl sso ssr sss