b-u bbb bbd bbi bbr bbs bbu bby bdb bdd bdi bdr bds bdu bdy bi- bib bid bii bir bis biu biy brb brd bri brr brs bru bry bsb bsd bsi bsr bss bsu bsy bub bud bui bur bus buu buy by- byd byi byr bys byu dbb dbd dbi dbr dbs dbu dby ddb ddd ddi ddr dds ddu ddy di- dib did dii dir dis diu diy drb drd dri drr drs dru dry dsb dsd dsi dsr dss dsu dsy dub dud dui dur dus duy dy- dyb dyd dyr dys dyu dyy i-d ibb ibd ibi ibr ibs ibu iby idb idd idi idr ids idu idy iib iid iii iir iis iiu ir- irb ird iri irr irs iru iry is- isb isd isi isr iss isu isy iu- iub iud iui iur ius iyr iys iyy rbb rbd rbi rbr rbs rbu rdb rdd rdi rdr rds rdu rdy rib rid rii rir ris riy rrb rrd rri rrr rrs rru rsb rsd rsi rsr rss rsu rub rud rui rur rus ruu ruy ry- ryd ryr rys ryu ryy sbb sbd sbi sbr sbs sbu sby sdb sdd sdi sdr sds sdu sdy sib sid sii sir sis siu sr- srb srd sri srr srs sry ss- ssb ssd ssi ssr sss ssu sub sud sui sur sus suu suy sy- syb syd syi syr sys syu ubb ubi ubr ubs ubu uby udb udd udi udr uds udu uib uid uii uir uis uiu ur- urb urd uri urr urs uru ury usb usd usi usr uss usu uur uus uuu uyi uys uyu ybi ybr ybs yby yds ydy yid yii yir yis yrs yru ysb ysi ysr yss ysu ysy yud yui yur yus yuu yuy yyb yys yyu yyy