bbb bbd bbi bbo bbr bby bdb bdd bdi bdo bdr bdy bi- bib bid bii bio bir biy bob bod boi boo bor boy brb brd bri bro brr bry by- byd byi byo byr dbb dbd dbi dbo dbr dby ddb ddd ddi ddo ddr ddy di- dib did dii dio dir diy dob dod doi doo dor doy drb drd dri dro drr dry dy- dyb dyd dyo dyr dyy i-d ibb ibd ibi ibo ibr iby idb idd idi ido idr idy iib iid iii iio iir io- iob iod ioi ioo ior ir- irb ird iri iro irr iry iyo iyr iyy o-i ob- obb obd obi obo obr oby odb odd odi odo odr oib oid oii oio oir oo- oob ood ooi ooo oor or- orb ord ori oro orr ory oyd oyi oyo rbb rbd rbi rbo rbr rdb rdd rdi rdo rdr rdy rib rid rii rio rir riy rob rod roi roo ror roy rrb rrd rri rrr ry- ryd ryo ryr ryy ybi ybr yby ydo ydy yid yii yio yir yob yod yoi yoo yor yoy yro yyb yyy