bbb bbd bbi bbo bby bdb bdd bdi bdo bdy bi- bib bid bii bio biy bob bod boi boo boy by- byd byi byo dbb dbd dbi dbo dby ddb ddd ddi ddo ddy di- dib did dii dio diy dob dod doi doo doy dy- dyb dyd dyo dyy i-d ibb ibd ibi ibo iby idb idd idi ido idy iib iid iii iio io- iob iod ioi ioo iyo iyy o-i ob- obb obd obi obo oby odb odd odi odo oib oid oii oio oo- oob ood ooi ooo oyd oyi oyo ybi yby ydo ydy yid yii yio yob yod yoi yoo yoy yyb yyy