bbb bbh bbi bbk bbo bbr bhb bhh bhi bhk bho bhr bi- bib bih bii bik bio bir bkb bkk bko bkr bob boh boi bok boo bor brb brh bri brk bro brr h-i hbb hbh hbi hbk hbo hbr hhb hhh hhi hhk hho hhr hib hih hii hik hio hir hkb hkh hki hkk hko hkr hob hoh hoi hok hoo hor hr- hrb hrh hri hrk hro hrr ibb ibh ibi ibk ibo ibr ihb ihh ihi ihk iho ihr iib iih iii iio iir ikb iki ikk iko ikr io- iob ioh ioi ioo ior ir- irb iri irk iro irr kbb kbh kbi kbk kbo kbr khh khi khk kho khr kib kih kii kik kio kir kkb kkh kki kkk kkr kob koh koi kok koo kor kri krk kro krr o-i ob- obb obh obi obk obo obr ohh ohi oho ohr oib oii oik oio oir okb oki okk oko okr oo- oob ooh ooi ook ooo oor or- orb orh ori ork oro orr rbb rbh rbi rbk rbo rbr rh- rhb rhh rhi rho rhr rib rih rii rik rio rir rkb rkk rko rob roh roi rok roo ror rrb rrh rri rrk rrr