-er ddd dde ddg ddi ddp ddr de- ded dee deg dei dep der dgd dge dgg dgi dgp dgr di- did die dig dii dip dir dpd dpe dpg dpi dpp dpr drd dre drg dri drp drr ed- edd ede edg edi edp edr eed eee eeg eep eer egd ege egg egi egp egr eid eie eig eii eip eir ep- epd epe epg epi epp epr erd ere erg eri erp err g-d g-p gdd gde gdi gdp gdr ge- ged gee geg gei gep ger ggd ggg ggi ggp ggr gid gie gig gii gip gir gpd gpe gpg gpi gpp gpr grd gre grg gri grp grr i-d idd ide idg idi idp idr ie- ied iee ieg iei iep ier igd ige igg igi igp igr iid iie iii iip iir ipd ipe ipg ipi ipp ipr ir- ird ire irg iri irp irr p-p pdd pde pdg pdi pdp pdr ped pee peg pei pep per pgd pge pgg pgi pgp pgr pid pie pig pii pip pir ppd ppe ppg ppi ppp ppr prd pre prg pri prp prr rdd rde rdg rdi rdp rdr re- red ree reg rei rep rer rgd rge rgg rgi rgp rgr rid rie rig rii rip rir rpd rpe rpg rpi rpp rpr rrd rrg rri rrp rrr