-ol bbb bbh bbk bbl bbo bbr bhb bhh bhk bhl bho bhr bkb bkk bkl bko bkr blb blh blk bll blo blr bob boh bok bol boo bor brb brh brk brl bro brr hbb hbh hbk hbl hbo hbr hhb hhh hhk hhl hho hhr hkb hkh hkk hkl hko hkr hlb hlh hll hlo hlr hob hoh hok hol hoo hor hr- hrb hrh hrk hrl hro hrr kbb kbh kbk kbl kbo kbr khh khk kho khr kkb kkh kkk kkl kkr kl- klb klh klo klr kob koh kok kol koo kor krk krl kro krr lbb lbh lbk lbl lbo lbr lhb lhh lhk lho lhr lkb lkh lkl lkr llb llk lll llo llr lob loh lok lol loo lor lrb lrh lrk lro lrr ob- obb obh obk obl obo obr ohh ohl oho ohr okb okk okl oko okr olb olk oll olo oo- oob ooh ook ool ooo oor or- orb orh ork orl oro orr rbb rbh rbk rbl rbo rbr rh- rhb rhh rhl rho rhr rkb rkk rko rlh rll rlo rlr rob roh rok rol roo ror rrb rrh rrk rrl rrr