-er bbb bbd bbe bbi bbo bbr bdb bdd bde bdi bdo bdr bdz be- beb bed bee bei beo ber bez bi- bib bid bie bii bio bir biz bob bod boe boi boo bor boz brb brd bre bri bro brr brz bzd bze bzo bzr bzz dbb dbd dbe dbi dbo dbr dbz ddb ddd dde ddi ddo ddr ddz de- deb ded dee dei deo der dez di- dib did die dii dio dir diz dob dod doe doi doo dor doz drb drd dre dri dro drr drz dzb dzd dze dzi dzo dzr ebb ebd ebe ebi ebo ebr ed- edb edd ede edi edo edr eeb eed eee eeo eer eib eid eie eii eio eir eo- eob eod eoe eoi eoo eor erb erd ere eri ero err erz eze ezo ezr ezz i-d ibb ibd ibe ibi ibo ibr ibz idb idd ide idi ido idr ie- ied iee iei ier iib iid iie iii iio iir io- iob iod ioe ioi ioo ior ir- irb ird ire iri iro irr ize izi izo izz o-i ob- obb obd obe obi obo obr odb odd ode odi odo odr oeb oed oee oei oeo oer oib oid oie oii oio oir oiz oo- oob ood ooi ooo oor or- orb ord ore ori oro orr orz oze ozo ozz rbb rbd rbe rbi rbo rbr rdb rdd rde rdi rdo rdr re- reb red ree rei reo rer rez rib rid rie rii rio rir riz rob rod roe roi roo ror roz rrb rrd rri rrr rzb rze rzo zbb zbr zeb zed zee zeo zer zez zib zid zie zio zir ziz zo- zob zod zoe zoi zoo zor zro zzr zzz