-er bbb bbd bbe bbi bbo bbr bdb bdd bde bdi bdo bdr be- beb bed bee bei beo ber bi- bib bid bie bii bio bir bob bod boe boi boo bor brb brd bre bri bro brr dbb dbd dbe dbi dbo dbr ddb ddd dde ddi ddo ddr de- deb ded dee dei deo der di- dib did die dii dio dir dob dod doe doi doo dor drb drd dre dri dro drr 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 i-d ibb ibd ibe ibi ibo ibr 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 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 oo- oob ood ooi ooo oor or- orb ord ore ori oro orr rbb rbd rbe rbi rbo rbr rdb rdd rde rdi rdo rdr re- reb red ree rei reo rer rib rid rie rii rio rir rob rod roe roi roo ror rrb rrd rri rrr