-er b-p bbb bbd bbe bbi bbo bbp bbr bdb bdd bde bdi bdo bdp bdr be- beb bed bee bei beo bep ber bi- bib bid bie bii bio bip bir bob bod boe boi boo bop bor bpb bpd bpe bpi bpo bpp bpr brb brd bre bri bro brp brr dbb dbd dbe dbi dbo dbp dbr ddb ddd dde ddi ddo ddp ddr de- deb ded dee dei deo dep der di- dib did die dii dio dip dir dob dod doe doi doo dop dor dpb dpd dpe dpi dpo dpp dpr drb drd dre dri dro drp drr ebb ebd ebe ebi ebo ebp ebr ed- edb edd ede edi edo edp edr eeb eed eee eeo eep eer eib eid eie eii eio eip eir eo- eob eod eoe eoi eoo eop eor ep- epb epd epe epi epo epp epr erb erd ere eri ero erp err i-d ibb ibd ibe ibi ibo ibp ibr idb idd ide idi ido idp idr ie- ied iee iei iep ier iib iid iie iii iio iip iir io- iob iod ioe ioi ioo iop ior ipb ipd ipe ipi ipo ipp ipr ir- irb ird ire iri iro irp irr o-i ob- obb obd obe obi obo obp obr odb odd ode odi odo odp odr oeb oed oee oei oeo oep oer oib oid oie oii oio oip oir oo- oob ood ooi ooo oop oor op- opb opd ope opi opo opp opr or- orb ord ore ori oro orp orr p-p pbb pbd pbe pbi pbo pbp pbr pdb pdd pde pdi pdo pdp pdr peb ped pee pei peo pep per pib pid pie pii pio pip pir pob pod poe poi poo pop por ppb ppd ppe ppi ppo ppp ppr prb prd pre pri pro prp prr rbb rbd rbe rbi rbo rbp rbr rdb rdd rde rdi rdo rdp rdr re- reb red ree rei reo rep rer rib rid rie rii rio rip rir rob rod roe roi roo rop ror rpb rpd rpe rpi rpo rpp rpr rrb rrd rri rrp rrr