bbb bbd bbi bbk bbo bbr bdb bdd bdi bdk bdo bdr bi- bib bid bii bik bio bir bkb bkk bko bkr bob bod boi bok boo bor brb brd bri brk bro brr dbb dbd dbi dbk dbo dbr ddb ddd ddi ddk ddo ddr di- dib did dii dik dio dir dkb dki dkk dko dkr dob dod doi dok doo dor drb drd dri drk dro drr i-d ibb ibd ibi ibk ibo ibr idb idd idi idk ido idr iib iid iii iio iir ikb iki ikk iko ikr io- iob iod ioi ioo ior ir- irb ird iri irk iro irr kbb kbd kbi kbk kbo kbr kdb kdk kdo kdr kib kid kii kik kio kir kkb kki kkk kkr kob kod koi kok koo kor krd kri krk kro krr o-i ob- obb obd obi obk obo obr odb odd odi odo odr oib oid oii oik oio oir okb okd oki okk oko okr oo- oob ood ooi ook ooo oor or- orb ord ori ork oro orr rbb rbd rbi rbk rbo rbr rdb rdd rdi rdo rdr rib rid rii rik rio rir rkb rkk rko rob rod roi rok roo ror rrb rrd rri rrk rrr