b-u bbb bbd bbi bbo bbu bby bdb bdd bdi bdo bdu bdy bi- bib bid bii bio biu biy bob bod boi boo bou boy bub bud bui buo buu buy by- byd byi byo byu dbb dbd dbi dbo dbu dby ddb ddd ddi ddo ddu ddy di- dib did dii dio diu diy dob dod doi doo dou doy dub dud dui duo duy dy- dyb dyd dyo dyu dyy i-d ibb ibd ibi ibo ibu iby idb idd idi ido idu idy iib iid iii iio iiu io- iob iod ioi ioo iou iu- iub iud iui iyo iyy o-i ob- obb obd obi obo obu oby odb odd odi odo odu oib oid oii oio oiu oo- oob ood ooi ooo ou- oud oui ouo oyd oyi oyo ubb ubi ubo ubu uby udb udd udi udo udu uib uid uii uio uiu uob uod uoo uuu uyi uyo uyu ybi yby ydo ydy yid yii yio yob yod yoi yoo you yoy yud yui yuo yuu yuy yyb yyu yyy