-er b-p bbb bbd bbe bbi bbo bbp bbr bbt bdb bdd bde bdi bdo bdp bdr bdt be- beb bed bee bei beo bep ber bet bi- bib bid bie bii bio bip bir bit bob bod boe boi boo bop bor bot bpb bpd bpe bpi bpo bpp bpr bpt brb brd bre bri bro brp brr brt btb btd bte bti bto btp btr btt dbb dbd dbe dbi dbo dbp dbr dbt ddb ddd dde ddi ddo ddp ddr ddt de- deb ded dee dei deo dep der det di- dib did die dii dio dip dir dit dob dod doe doi doo dop dor dot dpb dpd dpe dpi dpo dpp dpr dpt drb drd dre dri dro drp drr drt dtb dtd dte dti dto dtp dtr dtt ebb ebd ebe ebi ebo ebp ebr ebt ed- edb edd ede edi edo edp edr edt eeb eed eee eeo eep eer eet eib eid eie eii eio eip eir eit eo- eob eod eoe eoi eoo eop eor eot ep- epb epd epe epi epo epp epr ept erb erd ere eri ero erp err ert etb etd ete eti eto etp etr ett i-d ibb ibd ibe ibi ibo ibp ibr ibt idb idd ide idi ido idp idr idt ie- ied iee iei iep ier iet iib iid iie iii iio iip iir iit io- iob iod ioe ioi ioo iop ior iot ipb ipd ipe ipi ipo ipp ipr ipt ir- irb ird ire iri iro irp irr irt itb itd ite iti ito itp itt o-i ob- obb obd obe obi obo obp obr obt odb odd ode odi odo odp odr odt oeb oed oee oei oeo oep oer oet oib oid oie oii oio oip oir oit oo- oob ood ooi ooo oop oor oot op- opb opd ope opi opo opp opr opt or- orb ord ore ori oro orp orr ort ot- otb otd ote oti oto otp otr ott p-p pbb pbd pbe pbi pbo pbp pbr pbt pdb pdd pde pdi pdo pdp pdr pdt peb ped pee pei peo pep per pet pib pid pie pii pio pip pir pit pob pod poe poi poo pop por pot ppb ppd ppe ppi ppo ppp ppr ppt prb prd pre pri pro prp prr prt pt- ptb ptd pte pti pto ptp ptr ptt rbb rbd rbe rbi rbo rbp rbr rbt rdb rdd rde rdi rdo rdp rdr rdt re- reb red ree rei reo rep rer ret rib rid rie rii rio rip rir rit rob rod roe roi roo rop ror rot rpb rpd rpe rpi rpo rpp rpr rpt rrb rrd rri rrp rrr rrt rtb rtd rte rti rto rtp rtr rtt tbb tbd tbe tbi tbo tbp tbr tbt tdb tdd tde tdi tdo tdp tdr tdt te- teb ted tee tei teo tep ter tet tib tid tie tii tio tip tir tit to- tob tod toe toi too top tor tot tpb tpd tpe tpi tpo tpp tpr tpt trb trd tre tri tro trp trr trt ttb ttd tte tti tto ttp ttr ttt