bbb bbd bbi bbo bbr bbt bby bdb bdd bdi bdo bdr bdt bdy bi- bib bid bii bio bir bit biy bob bod boi boo bor bot boy brb brd bri bro brr brt bry btb btd bti bto btr btt bty by- byd byi byo byr byt dbb dbd dbi dbo dbr dbt dby ddb ddd ddi ddo ddr ddt ddy di- dib did dii dio dir dit diy dob dod doi doo dor dot doy drb drd dri dro drr drt dry dtb dtd dti dto dtr dtt dty dy- dyb dyd dyo dyr dyy i-d ibb ibd ibi ibo ibr ibt iby idb idd idi ido idr idt idy iib iid iii iio iir iit io- iob iod ioi ioo ior iot ir- irb ird iri iro irr irt iry itb itd iti ito itt ity iyo iyr iyt iyy o-i ob- obb obd obi obo obr obt oby odb odd odi odo odr odt oib oid oii oio oir oit oo- oob ood ooi ooo oor oot or- orb ord ori oro orr ort ory ot- otb otd oti oto otr ott oyd oyi oyo rbb rbd rbi rbo rbr rbt rdb rdd rdi rdo rdr rdt rdy rib rid rii rio rir rit riy rob rod roi roo ror rot roy rrb rrd rri rrr rrt rtb rtd rti rto rtr rtt rty ry- ryd ryo ryr ryy tbb tbd tbi tbo tbr tbt tdb tdd tdi tdo tdr tdt tdy tib tid tii tio tir tit tiy to- tob tod toi too tor tot toy trb trd tri tro trr trt try ttb ttd tti tto ttr ttt tty tyd tyo tyr tyt ybi ybr yby ydo ydt ydy yid yii yio yir yit yob yod yoi yoo yor yot yoy yro yrt ytd yto ytr ytt yyb yyt yyy