-ol bbb bbh bbk bbl bbo bhb bhh bhk bhl bho bhv bkb bkk bkl bko bkv blb blh blk bll blo blv bob boh bok bol boo bov bvb bvh bvk bvl bvo bvv hbb hbh hbk hbl hbo hbv hhb hhh hhk hhl hho hhv hkb hkh hkk hkl hko hlb hlh hll hlo hlv hob hoh hok hol hoo hov hv- hvb hvk hvl hvo hvv kbb kbh kbk kbl kbo khh khk kho khv kkb kkh kkk kkl kkv kl- klb klh klo klv kob koh kok kol koo kvb kvh kvk kvo kvv lbb lbh lbk lbl lbo lbv lhb lhh lhk lho lhv lkb lkh lkl llb llk lll llo llv lob loh lok lol loo lov lvb lvh lvl lvv ob- obb obh obk obl obo obv ohh ohl oho okb okk okl oko olb olk oll olo oo- oob ooh ook ool ooo oov ov- ovb ovh ovl ovo ovv vbh vbk vbl vbo vbv vh- vhb vho vkb vl- vlb vlk vll vlo vlv vob voh vok vol voo vov vvb vvo vvv