-er ddd dde ddg ddi ddp ddr ddt de- ded dee deg dei dep der det dgd dge dgg dgi dgp dgr dgt di- did die dig dii dip dir dit dpd dpe dpg dpi dpp dpr dpt drd dre drg dri drp drr drt dtd dte dtg dti dtp dtr dtt ed- edd ede edg edi edp edr edt eed eee eeg eep eer eet egd ege egg egi egp egr egt eid eie eig eii eip eir eit ep- epd epe epg epi epp epr ept erd ere erg eri erp err ert etd ete etg eti etp etr ett g-d g-p gdd gde gdi gdp gdr gdt ge- ged gee geg gei gep ger get ggd ggg ggi ggp ggr ggt gid gie gig gii gip gir git gpd gpe gpg gpi gpp gpr gpt grd gre grg gri grp grr grt gtd gte gtg gti gtp gtr gtt i-d idd ide idg idi idp idr idt ie- ied iee ieg iei iep ier iet igd ige igg igi igp igr igt iid iie iii iip iir iit ipd ipe ipg ipi ipp ipr ipt ir- ird ire irg iri irp irr irt itd ite itg iti itp itt p-p pdd pde pdg pdi pdp pdr pdt ped pee peg pei pep per pet pgd pge pgg pgi pgp pgr pgt pid pie pig pii pip pir pit ppd ppe ppg ppi ppp ppr ppt prd pre prg pri prp prr prt pt- ptd pte ptg pti ptp ptr ptt rdd rde rdg rdi rdp rdr rdt re- red ree reg rei rep rer ret rgd rge rgg rgi rgp rgr rgt rid rie rig rii rip rir rit rpd rpe rpg rpi rpp rpr rpt rrd rrg rri rrp rrr rrt rtd rte rtg rti rtp rtr rtt tdd tde tdg tdi tdp tdr tdt te- ted tee teg tei tep ter tet tge tgg tgi tgp tgr tgt tid tie tig tii tip tir tit tpd tpe tpg tpi tpp tpr tpt trd tre trg tri trp trr trt ttd tte ttg tti ttp ttr ttt