-er bbb bbd bbe bbi bbk bbo bbr bdb bdd bde bdi bdk bdo bdr bdz be- beb bed bee bei bek beo ber bez bi- bib bid bie bii bik bio bir biz bkb bke bkk bko bkr bob bod boe boi bok boo bor boz brb brd bre bri brk bro brr brz bzd bze bzo bzr bzz dbb dbd dbe dbi dbk dbo dbr dbz ddb ddd dde ddi ddk ddo ddr ddz de- deb ded dee dei dek deo der dez di- dib did die dii dik dio dir diz dkb dke dki dkk dko dkr dob dod doe doi dok doo dor doz drb drd dre dri drk dro drr drz dzb dzd dze dzi dzo dzr ebb ebd ebe ebi ebk ebo ebr ed- edb edd ede edi edk edo edr eeb eed eee eek eeo eer eib eid eie eii eik eio eir ekb ekd eke eki eko ekr eo- eob eod eoe eoi eok eoo eor erb erd ere eri erk ero err erz eze ezo ezr ezz i-d ibb ibd ibe ibi ibk ibo ibr ibz idb idd ide idi idk ido idr ie- ied iee iei iek ier iib iid iie iii iio iir ikb ike iki ikk iko ikr io- iob iod ioe ioi ioo ior ir- irb ird ire iri irk iro irr ize izi izo izz k-z kbb kbd kbe kbi kbk kbo kbr kbz kdb kde kdk kdo kdr ke- keb ked kee kei kek keo ker kez kib kid kie kii kik kio kir kiz kkb kke kki kkk kkr kob kod koe koi kok koo kor koz krd kri krk kro krr kzo o-i ob- obb obd obe obi obk obo obr odb odd ode odi odo odr oeb oed oee oei oeo oer oib oid oie oii oik oio oir oiz okb okd oke oki okk oko okr oo- oob ood ooi ook ooo oor or- orb ord ore ori ork oro orr orz oze ozo ozz rbb rbd rbe rbi rbk rbo rbr rdb rdd rde rdi rdo rdr re- reb red ree rei rek reo rer rez rib rid rie rii rik rio rir riz rkb rke rkk rko rkz rob rod roe roi rok roo ror roz rrb rrd rri rrk rrr rzb rze rzo zbb zbr zeb zed zee zek zeo zer zez zib zid zie zik zio zir ziz zo- zob zod zoe zoi zok zoo zor zro zzr zzz