-er ddd dde ddf ddi ddl ddp ddr dds ddt de- ded dee def dei del dep der des det dfd dfe dff dfi dfl dfp dfr dfs dft di- did die dif dii dil dip dir dis dit dl- dld dle dlf dli dll dlp dlr dls dlt dpd dpe dpf dpi dpl dpp dpr dps dpt drd dre dri drl drp drr drs drt dsd dse dsf dsi dsl dsp dsr dss dst dtd dte dtf dti dtl dtp dtr dts dtt ed- edd ede edf edi edl edp edr eds edt eed eee eef eel eep eer ees eet ef- efd efe eff efi efl efp efr efs eft eid eie eif eii eil eip eir eis eit eld ele elf eli ell elp elr els elt ep- epd epe epf epi epl epp epr eps ept erd ere erf eri erl erp err ers ert es- esd ese esf esi esl esp esr ess est etd ete etf eti etl etp etr ets ett fdd fde fdf fdi fdl fdp fdr fds fdt fed fee fef fei fel fep fer fes fet ffd ffe fff ffi ffl ffp ffr ffs fft fid fie fif fii fil fip fir fis fit fld fle flf fli fll flp flr fls flt fpd fpe fpi fpl fpp fpr fps fpt frd fre frf fri frl frp frr frs frt fsd fse fsf fsi fsl fsp fsr fss fst ftd fte ftf fti ftl ftp ftr fts ftt i-d i-f idd ide idf idi idl idp idr ids idt ie- ied iee ief iei iel iep ier ies iet ifd ife iff ifi ifl ifp ifr ifs ift iid iie iif iii iil iip iir iis iit il- ild ile ilf ili ill ilp ilr ils ilt ipd ipe ipf ipi ipl ipp ipr ips ipt ir- ird ire irf iri irl irp irr irs irt is- isd ise isf isi isl isp isr iss ist itd ite itf iti itl itp its itt l-p ldd lde ldf ldi ldl ldp ldr lds ldt led lee lef lei lel lep ler les let lfd lfe lff lfi lfl lfp lfr lfs lft lid lie lif lii lil lip lir lis lit lld lle llf lli lll llp llr lls llt lpd lpe lpf lpi lpl lpp lpr lps lpt lrd lrf lri lrp lrr lrs lrt lsd lse lsf lsi lsl lsp lsr lss lst ltd lte ltf lti ltl ltp ltr lts ltt p-p pdd pde pdf pdi pdl pdp pdr pds pdt ped pee pef pei pel pep per pes pet pfd pfe pff pfi pfl pfp pfr pfs pft pid pie pif pii pil pip pir pis pit pld ple plf pli pll plp plr pls plt ppd ppe ppf ppi ppl ppp ppr pps ppt prd pre prf pri prl prp prr prs prt ps- psd pse psf psi psl psp psr pss pst pt- ptd pte ptf pti ptl ptp ptr pts ptt rdd rde rdf rdi rdl rdp rdr rds rdt re- red ree ref rei rel rep rer res ret rfd rfe rff rfi rfl rfp rfr rfs rft rid rie rif rii ril rip rir ris rit rld rle rlf rli rll rlp rlr rls rlt rpd rpe rpf rpi rpl rpp rpr rps rpt rrd rrf rri rrl rrp rrr rrs rrt rsd rse rsf rsi rsl rsp rsr rss rst rtd rte rtf rti rtl rtp rtr rts rtt sdd sde sdf sdi sdl sdp sdr sds sdt se- sed see sef sei sel sep ser ses set sfd sfe sff sfi sfl sfp sfr sfs sft sid sie sif sii sil sip sir sis sit sld sle slf sli sll slp slr sls slt spd spe spf spi spl spp spr sps spt sr- srd sre srf sri srl srp srr srs srt ss- ssd sse ssf ssi ssl ssp ssr sss sst std ste stf sti stl stp str sts stt tdd tde tdf tdi tdl tdp tdr tds tdt te- ted tee tef tei tel tep ter tes tet tfd tfe tff tfi tfl tfp tfr tfs tft tid tie tif tii til tip tir tis tit tld tle tlf tli tll tlp tlr tls tlt tpd tpe tpf tpi tpl tpp tpr tps tpt trd tre trf tri trl trp trr trs trt tsd tse tsf tsi tsl tsp tsr tss tst ttd tte ttf tti ttl ttp ttr tts ttt