-ol bbb bbh bbk bbl bbo bbs bhb bhh bhk bhl bho bhs bkb bkk bkl bko bks blb blh blk bll blo bls bob boh bok bol boo bos bsb bsh bsk bsl bso bss hbb hbh hbk hbl hbo hbs hhb hhh hhk hhl hho hhs hkb hkh hkk hkl hko hks hlb hlh hll hlo hls hob hoh hok hol hoo hos hsb hsh hsk hsl hss kbb kbh kbk kbl kbo kbs khh khk kho khs kkb kkh kkk kkl kks kl- klb klh klo kls kob koh kok kol koo kos ksb ksh ksk ksl kso kss lbb lbh lbk lbl lbo lbs lhb lhh lhk lho lhs lkb lkh lkl lks llb llk lll llo lls lob loh lok lol loo los lsb lsh lsk lsl lso lss ob- obb obh obk obl obo obs ohh ohl oho ohs okb okk okl oko oks olb olk oll olo ols oo- oob ooh ook ool ooo oos os- osb osh osk osl oso oss sbb sbh sbk sbl sbo sbs sh- shb shh shk shl sho shs sk- skb skh skk skl sko sks slb slh slk sll slo sls sob soh sok sol soo sos ss- ssb ssh ssk ssl sso sss