bbb bbd bbi bbo bbs bby bdb bdd bdi bdo bds bdy bi- bib bid bii bio bis biy bob bod boi boo bos boy bsb bsd bsi bso bss bsy by- byd byi byo bys dbb dbd dbi dbo dbs dby ddb ddd ddi ddo dds ddy di- dib did dii dio dis diy dob dod doi doo dos doy dsb dsd dsi dso dss dsy dy- dyb dyd dyo dys dyy i-d ibb ibd ibi ibo ibs iby idb idd idi ido ids idy iib iid iii iio iis io- iob iod ioi ioo ios is- isb isd isi iso iss isy iyo iys iyy o-i ob- obb obd obi obo obs oby odb odd odi odo ods oib oid oii oio ois oo- oob ood ooi ooo oos os- osb osd osi oso oss oyd oyi oyo oys sbb sbd sbi sbo sbs sby sdb sdd sdi sdo sds sdy sib sid sii sio sis sob sod soi soo sos soy ss- ssb ssd ssi sso sss sy- syb syd syi sys ybi ybs yby ydo yds ydy yid yii yio yis yob yod yoi yoo yos yoy ysb ysi yso yss ysy yyb yys yyy