-er ddd dde ddf ddi ddo ddp ddr de- ded dee def dei deo dep der dfd dfe dff dfi dfo dfp dfr di- did die dif dii dio dip dir dod doe dof doi doo dop dor dpd dpe dpf dpi dpo dpp dpr drd dre dri dro drp drr ed- edd ede edf edi edo edp edr eed eee eef eeo eep eer ef- efd efe eff efi efo efp efr eid eie eif eii eio eip eir eo- eod eoe eof eoi eoo eop eor ep- epd epe epf epi epo epp epr erd ere erf eri ero erp err fdd fde fdf fdi fdo fdp fdr fed fee fef fei feo fep fer ffd ffe fff ffi ffo ffp ffr fid fie fif fii fip fir foe fof foi foo fop for fpd fpe fpi fpo fpp fpr frd fre frf fri fro frp frr i-d i-f idd ide idf idi ido idp idr ie- ied iee ief iei iep ier ifd ife iff ifi ifo ifp ifr iid iie iif iii iio iip iir io- iod ioe iof ioi ioo iop ior ipd ipe ipf ipi ipo ipp ipr ir- ird ire irf iri iro irp irr o-i odd ode odf odi odo odp odr oed oee oef oei oeo oep oer of- ofd ofe off ofi ofo ofp ofr oid oie oif oii oio oip oir oo- ood oof ooi ooo oop oor op- opd ope opf opi opo opp opr or- ord ore orf ori oro orp orr p-p pdd pde pdf pdi pdo pdp pdr ped pee pef pei peo pep per pfd pfe pff pfi pfo pfp pfr pid pie pif pii pio pip pir pod poe pof poi poo pop por ppd ppe ppf ppi ppo ppp ppr prd pre prf pri pro prp prr rdd rde rdf rdi rdo rdp rdr re- red ree ref rei reo rep rer rfd rfe rff rfi rfo rfp rfr rid rie rif rii rio rip rir rod roe rof roi roo rop ror rpd rpe rpf rpi rpo rpp rpr rrd rrf rri rrp rrr