-er ddd dde ddf ddi ddp ddr ddt de- ded dee def dei dep der det dfd dfe dff dfi dfp dfr dft di- did die dif dii dip dir dit dpd dpe dpf dpi dpp dpr dpt drd dre dri drp drr drt dtd dte dtf dti dtp dtr dtt ed- edd ede edf edi edp edr edt eed eee eef eep eer eet ef- efd efe eff efi efp efr eft eid eie eif eii eip eir eit ep- epd epe epf epi epp epr ept erd ere erf eri erp err ert etd ete etf eti etp etr ett fdd fde fdf fdi fdp fdr fdt fed fee fef fei fep fer fet ffd ffe fff ffi ffp ffr fft fid fie fif fii fip fir fit fpd fpe fpi fpp fpr fpt frd fre frf fri frp frr frt ftd fte ftf fti ftp ftr ftt i-d i-f idd ide idf idi idp idr idt ie- ied iee ief iei iep ier iet ifd ife iff ifi ifp ifr ift iid iie iif iii iip iir iit ipd ipe ipf ipi ipp ipr ipt ir- ird ire irf iri irp irr irt itd ite itf iti itp itt p-p pdd pde pdf pdi pdp pdr pdt ped pee pef pei pep per pet pfd pfe pff pfi pfp pfr pft pid pie pif pii pip pir pit ppd ppe ppf ppi ppp ppr ppt prd pre prf pri prp prr prt pt- ptd pte ptf pti ptp ptr ptt rdd rde rdf rdi rdp rdr rdt re- red ree ref rei rep rer ret rfd rfe rff rfi rfp rfr rft rid rie rif rii rip rir rit rpd rpe rpf rpi rpp rpr rpt rrd rrf rri rrp rrr rrt rtd rte rtf rti rtp rtr rtt tdd tde tdf tdi tdp tdr tdt te- ted tee tef tei tep ter tet tfd tfe tff tfi tfp tfr tft tid tie tif tii tip tir tit tpd tpe tpf tpi tpp tpr tpt trd tre trf tri trp trr trt ttd tte ttf tti ttp ttr ttt