-er ddd dde ddf ddi ddo ddp ddr ddt de- ded dee def dei deo dep der det dfd dfe dff dfi dfo dfp dfr dft di- did die dif dii dio dip dir dit dod doe dof doi doo dop dor dot dpd dpe dpf dpi dpo dpp dpr dpt drd dre dri dro drp drr drt dtd dte dtf dti dto dtp dtr dtt ed- edd ede edf edi edo edp edr edt eed eee eef eeo eep eer eet ef- efd efe eff efi efo efp efr eft eid eie eif eii eio eip eir eit eo- eod eoe eof eoi eoo eop eor eot ep- epd epe epf epi epo epp epr ept erd ere erf eri ero erp err ert etd ete etf eti eto etp etr ett fdd fde fdf fdi fdo fdp fdr fdt fed fee fef fei feo fep fer fet ffd ffe fff ffi ffo ffp ffr fft fid fie fif fii fip fir fit foe fof foi foo fop for fot fpd fpe fpi fpo fpp fpr fpt frd fre frf fri fro frp frr frt ftd fte ftf fti fto ftp ftr ftt i-d i-f idd ide idf idi ido idp idr idt ie- ied iee ief iei iep ier iet ifd ife iff ifi ifo ifp ifr ift iid iie iif iii iio iip iir iit io- iod ioe iof ioi ioo iop ior iot ipd ipe ipf ipi ipo ipp ipr ipt ir- ird ire irf iri iro irp irr irt itd ite itf iti ito itp itt o-i odd ode odf odi odo odp odr odt oed oee oef oei oeo oep oer oet of- ofd ofe off ofi ofo ofp ofr oft oid oie oif oii oio oip oir oit oo- ood oof ooi ooo oop oor oot op- opd ope opf opi opo opp opr opt or- ord ore orf ori oro orp orr ort ot- otd ote otf oti oto otp otr ott p-p pdd pde pdf pdi pdo pdp pdr pdt ped pee pef pei peo pep per pet pfd pfe pff pfi pfo pfp pfr pft pid pie pif pii pio pip pir pit pod poe pof poi poo pop por pot ppd ppe ppf ppi ppo ppp ppr ppt prd pre prf pri pro prp prr prt pt- ptd pte ptf pti pto ptp ptr ptt rdd rde rdf rdi rdo rdp rdr rdt re- red ree ref rei reo rep rer ret rfd rfe rff rfi rfo rfp rfr rft rid rie rif rii rio rip rir rit rod roe rof roi roo rop ror rot rpd rpe rpf rpi rpo rpp rpr rpt rrd rrf rri rrp rrr rrt rtd rte rtf rti rto rtp rtr rtt tdd tde tdf tdi tdo tdp tdr tdt te- ted tee tef tei teo tep ter tet tfd tfe tff tfi tfo tfp tfr tft tid tie tif tii tio tip tir tit to- tod toe tof toi too top tor tot tpd tpe tpf tpi tpo tpp tpr tpt trd tre trf tri tro trp trr trt ttd tte ttf tti tto ttp ttr ttt