-ey bbb bbd bbe bbk bbo bby bdb bdd bde bdk bdo bdy be- beb bed bee bek beo bey bkb bke bkk bko bob bod boe bok boo boy by- byd bye byk byo dbb dbd dbe dbk dbo dby ddb ddd dde ddk ddo ddy de- deb ded dee dek deo dey dkb dke dkk dko dob dod doe dok doo doy dy- dyb dyd dye dyk dyo dyy ebb ebd ebe ebk ebo eby ed- edb edd ede edk edo edy eeb eed eee eek eeo eey ekb ekd eke eko eky eo- eob eod eoe eok eoo eyd eye eyo kbb kbd kbe kbk kbo kdb kde kdk kdo kdy ke- keb ked kee kek keo key kkb kke kkk kky kob kod koe kok koo koy kyd kye kyo ob- obb obd obe obk obo oby odb odd ode odo oeb oed oee oeo oey okb okd oke okk oko oo- oob ood ook ooo oyd oye oyo ybe yby yde ydo ydy yeb yed yee yek yeo yey ykk yob yod yoe yok yoo yoy yyb yye yyy