bbb bbd bbi bbk bbo bbr bdb bdd bdi bdk bdo bdr bdv bi- bib bid bii bik bio bir biv bkb bkk bko bkr bkv bob bod boi bok boo bor bov brb brd bri brk bro brr brv bvb bvd bvi bvk bvo bvr bvv dbb dbd dbi dbk dbo dbr dbv ddb ddd ddi ddk ddo ddr di- dib did dii dik dio dir div dkb dki dkk dko dkr dob dod doi dok doo dor dov drb drd dri drk dro drr drv dvb dvd dvi dvk dvr i-d i-v ibb ibd ibi ibk ibo ibr ibv idb idd idi idk ido idr idv iib iid iii iio iir ikb iki ikk iko ikr ikv io- iob iod ioi ioo ior iov ir- irb ird iri irk iro irr irv ivb ivd ivi ivo ivr ivv kbb kbd kbi kbk kbo kbr kdb kdk kdo kdr kib kid kii kik kio kir kiv kkb kki kkk kkr kkv kob kod koi kok koo kor krd kri krk kro krr krv kvb kvi kvk kvo kvr kvv o-i ob- obb obd obi obk obo obr obv odb odd odi odo odr odv oib oid oii oik oio oir oiv okb okd oki okk oko okr oo- oob ood ooi ook ooo oor oov or- orb ord ori ork oro orr orv ov- ovb ovd ovi ovo ovv rbb rbd rbi rbk rbo rbr rdb rdd rdi rdo rdr rdv rib rid rii rik rio rir riv rkb rkk rko rkv rob rod roi rok roo ror rov rrb rrd rri rrk rrr rvb rvd rvi rvo rvr rvv vbd vbi vbk vbo vbr vbv vdb vdd vdi vdk vdo vdr vdv vi- vib vid vii vik vio vir viv vkb vob vod voi vok voo vor vov vrb vrd vri vrk vrr vvb vvi vvo vvr vvv