bbb bbh bbi bbo bbr bhb bhh bhi bho bhr bi- bib bih bii bio bir bob boh boi boo bor brb brh bri bro brr h-i hbb hbh hbi hbo hbr hhb hhh hhi hho hhr hib hih hii hio hir hob hoh hoi hoo hor hr- hrb hrh hri hro hrr ibb ibh ibi ibo ibr ihb ihh ihi iho ihr iib iih iii iio iir io- iob ioh ioi ioo ior ir- irb iri iro irr o-i ob- obb obh obi obo obr ohh ohi oho ohr oib oii oio oir oo- oob ooh ooi ooo oor or- orb orh ori oro orr rbb rbh rbi rbo rbr rh- rhb rhh rhi rho rhr rib rih rii rio rir rob roh roi roo ror rrb rrh rri rrr