-ey bbb bbd bbe bbk bbo bbs bby bdb bdd bde bdk bdo bds bdy be- beb bed bee bek beo bes bey bkb bke bkk bko bks bob bod boe bok boo bos boy bsb bsd bse bsk bso bss bsy by- byd bye byk byo bys dbb dbd dbe dbk dbo dbs dby ddb ddd dde ddk ddo dds ddy de- deb ded dee dek deo des dey dkb dke dkk dko dks dob dod doe dok doo dos doy dsb dsd dse dsk dso dss dsy dy- dyb dyd dye dyk dyo dys dyy ebb ebd ebe ebk ebo ebs eby ed- edb edd ede edk edo eds edy eeb eed eee eek eeo ees eey ekb ekd eke eko eks eky eo- eob eod eoe eok eoo eos es- esb esd ese esk eso ess esy eyd eye eyo eys kbb kbd kbe kbk kbo kbs kdb kde kdk kdo kds kdy ke- keb ked kee kek keo kes key kkb kke kkk kks kky kob kod koe kok koo kos koy ksb ksd kse ksk kso kss kyd kye kyo kys ob- obb obd obe obk obo obs oby odb odd ode odo ods oeb oed oee oeo oes oey okb okd oke okk oko oks oo- oob ood ook ooo oos os- osb osd ose osk oso oss oyd oye oyo oys sbb sbd sbe sbk sbo sbs sby sdb sdd sde sdk sdo sds sdy se- seb sed see sek seo ses sey sk- skb skd ske skk sko sks sky sob sod soe sok soo sos soy ss- ssb ssd sse ssk sso sss sy- syb syd sye syk sys ybe ybs yby yde ydo yds ydy yeb yed yee yek yeo yes yey ykk yob yod yoe yok yoo yos yoy ysb yse ysk yso yss ysy yyb yye yys yyy