bbb bbd bbi bbo bbr bbs bbt bby bdb bdd bdi bdo bdr bds bdt bdy bi- bib bid bii bio bir bis bit biy bob bod boi boo bor bos bot boy brb brd bri bro brr brs brt bry bsb bsd bsi bso bsr bss bst bsy btb btd bti bto btr bts btt bty by- byd byi byo byr bys byt dbb dbd dbi dbo dbr dbs dbt dby ddb ddd ddi ddo ddr dds ddt ddy di- dib did dii dio dir dis dit diy dob dod doi doo dor dos dot doy drb drd dri dro drr drs drt dry dsb dsd dsi dso dsr dss dst dsy dtb dtd dti dto dtr dts dtt dty dy- dyb dyd dyo dyr dys dyy i-d ibb ibd ibi ibo ibr ibs ibt iby idb idd idi ido idr ids idt idy iib iid iii iio iir iis iit io- iob iod ioi ioo ior ios iot ir- irb ird iri iro irr irs irt iry is- isb isd isi iso isr iss ist isy itb itd iti ito its itt ity iyo iyr iys iyt iyy o-i ob- obb obd obi obo obr obs obt oby odb odd odi odo odr ods odt oib oid oii oio oir ois oit oo- oob ood ooi ooo oor oos oot or- orb ord ori oro orr ors ort ory os- osb osd osi oso osr oss ost ot- otb otd oti oto otr ots ott oyd oyi oyo oys rbb rbd rbi rbo rbr rbs rbt rdb rdd rdi rdo rdr rds rdt rdy rib rid rii rio rir ris rit riy rob rod roi roo ror ros rot roy rrb rrd rri rrr rrs rrt rsb rsd rsi rso rsr rss rst rtb rtd rti rto rtr rts rtt rty ry- ryd ryo ryr rys ryy sbb sbd sbi sbo sbr sbs sbt sby sdb sdd sdi sdo sdr sds sdt sdy sib sid sii sio sir sis sit sob sod soi soo sor sos sot soy sr- srb srd sri sro srr srs srt sry ss- ssb ssd ssi sso ssr sss sst stb std sti sto str sts stt sty sy- syb syd syi syr sys syt tbb tbd tbi tbo tbr tbs tbt tdb tdd tdi tdo tdr tds tdt tdy tib tid tii tio tir tis tit tiy to- tob tod toi too tor tos tot toy trb trd tri tro trr trs trt try tsb tsd tsi tso tsr tss tst tsy ttb ttd tti tto ttr tts ttt tty tyd tyo tyr tys tyt ybi ybr ybs yby ydo yds ydt ydy yid yii yio yir yis yit yob yod yoi yoo yor yos yot yoy yro yrs yrt ysb ysi yso ysr yss yst ysy ytd yto ytr yts ytt yyb yys yyt yyy