bbb bbg bbi bbk bbo bbr bgb bgg bgi bgk bgo bgr bi- bib big bii bik bio bir bkb bkg bkk bko bkr bob bog boi bok boo bor brb brg bri brk bro brr gbg gbi gbk gbo gbr ggb ggg ggi ggo ggr gib gig gii gik gio gir gkb gko gob gog goi gok goo gor grb grg gri grk gro grr ibb ibg ibi ibk ibo ibr igb igg igi igk igo igr iib iii iio iir ikb iki ikk iko ikr io- iob iog ioi ioo ior ir- irb irg iri irk iro irr kbb kbi kbk kbo kbr kgb kgi kgo kib kig kii kik kio kir kkb kki kkk kkr kob kog koi kok koo kor krg kri krk kro krr o-i ob- obb obg obi obk obo obr ogg ogi ogo oib oii oik oio oir okb okg oki okk oko okr oo- oob oog ooi ook ooo oor or- orb org ori ork oro orr rbb rbg rbi rbk rbo rbr rgb rgg rgi rgk rgo rgr rib rig rii rik rio rir rkb rkg rkk rko rob rog roi rok roo ror rrb rrg rri rrk rrr