-er -up ddd dde ddf ddp ddr ddt ddu de- ded dee def dep der det deu dfd dfe dff dfp dfr dft dfu dpd dpe dpf dpp dpr dpt dpu drd dre drp drr drt dru dtd dte dtf dtp dtr dtt dtu dud due duf dup dur dut ed- edd ede edf edp edr edt edu eed eee eef eep eer eet ef- efd efe eff efp efr eft ep- epd epe epf epp epr ept epu erd ere erf erp err ert eru etd ete etf etp etr ett etu eu- eud eue euf eup eur eut fdd fde fdf fdp fdr fdt fdu fed fee fef fep fer fet feu ffd ffe fff ffp ffr fft ffu fpd fpe fpp fpr fpt fpu frd fre frf frp frr frt fru ftd fte ftf ftp ftr ftt ftu fud fue fuf fup fur fut fuu p-p pdd pde pdf pdp pdr pdt pdu ped pee pef pep per pet peu pfd pfe pff pfp pfr pft pfu ppd ppe ppf ppp ppr ppt ppu prd pre prf prp prr prt pru pt- ptd pte ptf ptp ptr ptt ptu pud pue puf pup pur put puu rdd rde rdf rdp rdr rdt rdu re- red ree ref rep rer ret reu rfd rfe rff rfp rfr rft rfu rpd rpe rpf rpp rpr rpt rpu rrd rrf rrp rrr rrt rru rtd rte rtf rtp rtr rtt rtu rud rue ruf rup rur rut ruu tdd tde tdf tdp tdr tdt tdu te- ted tee tef tep ter tet teu tfd tfe tff tfp tfr tft tfu tpd tpe tpf tpp tpr tpt tpu trd tre trf trp trr trt tru ttd tte ttf ttp ttr ttt ttu tud tue tuf tup tur tut tuu udd ude udf udp udr udt udu ued uee uef uep uer uet ufd ufe uff ufp ufr uft ufu up- upd upe upf upp upr upt upu ur- urd ure urf urp urr urt uru utd ute utf utp utr utt utu uue uur uut uuu