bbb bbd bbi bbo bbr bdb bdd bdi bdo bdr bdv bi- bib bid bii bio bir biv bob bod boi boo bor bov brb brd bri bro brr brv bvb bvd bvi bvo bvr bvv dbb dbd dbi dbo dbr dbv ddb ddd ddi ddo ddr di- dib did dii dio dir div dob dod doi doo dor dov drb drd dri dro drr drv dvb dvd dvi dvr i-d i-v ibb ibd ibi ibo ibr ibv idb idd idi ido idr idv iib iid iii iio iir io- iob iod ioi ioo ior iov ir- irb ird iri iro irr irv ivb ivd ivi ivo ivr ivv o-i ob- obb obd obi obo obr obv odb odd odi odo odr odv oib oid oii oio oir oiv oo- oob ood ooi ooo oor oov or- orb ord ori oro orr orv ov- ovb ovd ovi ovo ovv rbb rbd rbi rbo rbr rdb rdd rdi rdo rdr rdv rib rid rii rio rir riv rob rod roi roo ror rov rrb rrd rri rrr rvb rvd rvi rvo rvr rvv vbd vbi vbo vbr vbv vdb vdd vdi vdo vdr vdv vi- vib vid vii vio vir viv vob vod voi voo vor vov vrb vrd vri vrr vvb vvi vvo vvr vvv