b-u bbb bbd bbi bbs bbu bby bdb bdd bdi bds bdu bdy bi- bib bid bii bis biu biy bsb bsd bsi bss bsu bsy bub bud bui bus buu buy by- byd byi bys byu dbb dbd dbi dbs dbu dby ddb ddd ddi dds ddu ddy di- dib did dii dis diu diy dsb dsd dsi dss dsu dsy dub dud dui dus duy dy- dyb dyd dys dyu dyy i-d ibb ibd ibi ibs ibu iby idb idd idi ids idu idy iib iid iii iis iiu is- isb isd isi iss isu isy iu- iub iud iui ius iys iyy sbb sbd sbi sbs sbu sby sdb sdd sdi sds sdu sdy sib sid sii sis siu ss- ssb ssd ssi sss ssu sub sud sui sus suu suy sy- syb syd syi sys syu ubb ubi ubs ubu uby udb udd udi uds udu uib uid uii uis uiu usb usd usi uss usu uus uuu uyi uys uyu ybi ybs yby yds ydy yid yii yis ysb ysi yss ysu ysy yud yui yus yuu yuy yyb yys yyu yyy