-er ddd dde ddg ddi ddo ddp ddr de- ded dee deg dei deo dep der dgd dge dgg dgi dgp dgr di- did die dig dii dio dip dir dod doe dog doi doo dop dor dpd dpe dpg dpi dpo dpp dpr drd dre drg dri dro drp drr ed- edd ede edg edi edo edp edr eed eee eeg eeo eep eer egd ege egg egi ego egp egr eid eie eig eii eio eip eir eo- eod eoe eog eoi eoo eop eor ep- epd epe epg epi epo epp epr erd ere erg eri ero erp err g-d g-p gdd gde gdi gdo gdp gdr ge- ged gee geg gei geo gep ger ggd ggg ggi ggo ggp ggr gid gie gig gii gio gip gir god goe gog goi goo gop gor gpd gpe gpg gpi gpo gpp gpr grd gre grg gri gro grp grr i-d idd ide idg idi ido idp idr ie- ied iee ieg iei iep ier igd ige igg igi igo igp igr iid iie iii iio iip iir io- iod ioe iog ioi ioo iop ior ipd ipe ipg ipi ipo ipp ipr ir- ird ire irg iri iro irp irr o-i odd ode odg odi odo odp odr oed oee oeg oei oeo oep oer ogd oge ogg ogi ogo ogp oid oie oii oio oip oir oo- ood oog ooi ooo oop oor op- opd ope opg opi opo opp opr or- ord ore org ori oro orp orr p-p pdd pde pdg pdi pdo pdp pdr ped pee peg pei peo pep per pgd pge pgg pgi pgo pgp pgr pid pie pig pii pio pip pir pod poe pog poi poo pop por ppd ppe ppg ppi ppo ppp ppr prd pre prg pri pro prp prr rdd rde rdg rdi rdo rdp rdr re- red ree reg rei reo rep rer rgd rge rgg rgi rgo rgp rgr rid rie rig rii rio rip rir rod roe rog roi roo rop ror rpd rpe rpg rpi rpo rpp rpr rrd rrg rri rrp rrr