b-u bbb bbd bbi bbo bbr bbt bbu bby bdb bdd bdi bdo bdr bdt bdu bdy bi- bib bid bii bio bir bit biu biy bob bod boi boo bor bot bou boy brb brd bri bro brr brt bru bry btb btd bti bto btr btt btu bty bub bud bui buo bur but buu buy by- byd byi byo byr byt byu dbb dbd dbi dbo dbr dbt dbu dby ddb ddd ddi ddo ddr ddt ddu ddy di- dib did dii dio dir dit diu diy dob dod doi doo dor dot dou doy drb drd dri dro drr drt dru dry dtb dtd dti dto dtr dtt dtu dty dub dud dui duo dur dut duy dy- dyb dyd dyo dyr dyu dyy i-d ibb ibd ibi ibo ibr ibt ibu iby idb idd idi ido idr idt idu idy iib iid iii iio iir iit iiu io- iob iod ioi ioo ior iot iou ir- irb ird iri iro irr irt iru iry itb itd iti ito itt itu ity iu- iub iud iui iur iut iyo iyr iyt iyy o-i ob- obb obd obi obo obr obt obu oby odb odd odi odo odr odt odu oib oid oii oio oir oit oiu oo- oob ood ooi ooo oor oot or- orb ord ori oro orr ort oru ory ot- otb otd oti oto otr ott otu ou- oud oui ouo our out oyd oyi oyo rbb rbd rbi rbo rbr rbt rbu rdb rdd rdi rdo rdr rdt rdu rdy rib rid rii rio rir rit riy rob rod roi roo ror rot rou roy rrb rrd rri rrr rrt rru rtb rtd rti rto rtr rtt rtu rty rub rud rui ruo rur rut ruu ruy ry- ryd ryo ryr ryu ryy tbb tbd tbi tbo tbr tbt tbu tdb tdd tdi tdo tdr tdt tdu tdy tib tid tii tio tir tit tiu tiy to- tob tod toi too tor tot tou toy trb trd tri tro trr trt tru try ttb ttd tti tto ttr ttt ttu tty tub tud tui tuo tur tut tuu tuy tyd tyo tyr tyt ubb ubi ubo ubr ubt ubu uby udb udd udi udo udr udt udu uib uid uii uio uir uit uiu uob uod uoo uor uot ur- urb urd uri uro urr urt uru ury utb utd uti uto utr utt utu uty uur uut uuu uyi uyo uyu ybi ybr yby ydo ydt ydy yid yii yio yir yit yob yod yoi yoo yor yot you yoy yro yrt yru ytd yto ytr ytt ytu yud yui yuo yur yut yuu yuy yyb yyt yyu yyy