bbb bbd bbi bbk bbo bbr bby bdb bdd bdi bdk bdo bdr bdy bdz bi- bib bid bii bik bio bir biy biz bkb bkk bko bkr bob bod boi bok boo bor boy boz brb brd bri brk bro brr bry brz by- byd byi byk byo byr byz bzd bzo bzr bzz dbb dbd dbi dbk dbo dbr dby dbz ddb ddd ddi ddk ddo ddr ddy ddz di- dib did dii dik dio dir diy diz dkb dki dkk dko dkr dob dod doi dok doo dor doy doz drb drd dri drk dro drr dry drz dy- dyb dyd dyk dyo dyr dyy dzb dzd dzi dzo dzr i-d ibb ibd ibi ibk ibo ibr iby ibz idb idd idi idk ido idr idy iib iid iii iio iir ikb iki ikk iko ikr io- iob iod ioi ioo ior ir- irb ird iri irk iro irr iry iyo iyr iyy izi izo izy izz k-z kbb kbd kbi kbk kbo kbr kbz kdb kdk kdo kdr kdy kib kid kii kik kio kir kiz kkb kki kkk kkr kky kob kod koi kok koo kor koy koz krd kri krk kro krr kry kyd kyo kyr kyz kzo kzy o-i ob- obb obd obi obk obo obr oby odb odd odi odo odr oib oid oii oik oio oir oiz okb okd oki okk oko okr oo- oob ood ooi ook ooo oor or- orb ord ori ork oro orr ory orz oyd oyi oyo ozo ozz rbb rbd rbi rbk rbo rbr rdb rdd rdi rdo rdr rdy rib rid rii rik rio rir riy riz rkb rkk rko rky rkz rob rod roi rok roo ror roy roz rrb rrd rri rrk rrr ry- ryd ryk ryo ryr ryy ryz rzb rzo rzy ybi ybr yby ybz ydo ydy yid yii yio yir yiz yki ykk yob yod yoi yok yoo yor yoy yro yyb yyy yyz yzb yzr yzy zbb zbr zby zib zid zik zio zir ziz zo- zob zod zoi zok zoo zor zro zzr zzy zzz