-er -ol ddd dde ddf ddi ddl ddo ddp ddr dds de- ded dee def dei del deo dep der des dfd dfe dff dfi dfl dfo dfp dfr dfs di- did die dif dii dil dio dip dir dis dl- dld dle dlf dli dll dlo dlp dlr dls dod doe dof doi dol doo dop dor dos dpd dpe dpf dpi dpl dpo dpp dpr dps drd dre dri drl dro drp drr drs dsd dse dsf dsi dsl dso dsp dsr dss ed- edd ede edf edi edl edo edp edr eds eed eee eef eel eeo eep eer ees ef- efd efe eff efi efl efo efp efr efs eid eie eif eii eil eio eip eir eis eld ele elf eli ell elo elp elr els eo- eod eoe eof eoi eol eoo eop eor eos ep- epd epe epf epi epl epo epp epr eps erd ere erf eri erl ero erp err ers es- esd ese esf esi esl eso esp esr ess fdd fde fdf fdi fdl fdo fdp fdr fds fed fee fef fei fel feo fep fer fes ffd ffe fff ffi ffl ffo ffp ffr ffs fid fie fif fii fil fip fir fis fld fle flf fli fll flo flp flr fls foe fof foi fol foo fop for fos fpd fpe fpi fpl fpo fpp fpr fps frd fre frf fri frl fro frp frr frs fsd fse fsf fsi fsl fso fsp fsr fss i-d i-f idd ide idf idi idl ido idp idr ids ie- ied iee ief iei iel iep ier ies ifd ife iff ifi ifl ifo ifp ifr ifs iid iie iif iii iil iio iip iir iis il- ild ile ilf ili ill ilo ilp ilr ils io- iod ioe iof ioi iol ioo iop ior ios ipd ipe ipf ipi ipl ipo ipp ipr ips ir- ird ire irf iri irl iro irp irr irs is- isd ise isf isi isl iso isp isr iss l-p ldd lde ldf ldi ldl ldo ldp ldr lds led lee lef lei lel leo lep ler les lfd lfe lff lfi lfl lfo lfp lfr lfs lid lie lif lii lil lio lip lir lis lld lle llf lli lll llo llp llr lls lod loe lof loi lol loo lop lor los lpd lpe lpf lpi lpl lpo lpp lpr lps lrd lrf lri lro lrp lrr lrs lsd lse lsf lsi lsl lso lsp lsr lss o-i odd ode odf odi odl odo odp odr ods oed oee oef oei oel oeo oep oer oes of- ofd ofe off ofi ofl ofo ofp ofr ofs oid oie oif oii oil oio oip oir ois old ole olf oli oll olo olp ols oo- ood oof ooi ool ooo oop oor oos op- opd ope opf opi opl opo opp opr ops or- ord ore orf ori orl oro orp orr ors os- osd ose osf osi osl oso osp osr oss p-p pdd pde pdf pdi pdl pdo pdp pdr pds ped pee pef pei pel peo pep per pes pfd pfe pff pfi pfl pfo pfp pfr pfs pid pie pif pii pil pio pip pir pis pld ple plf pli pll plo plp plr pls pod poe pof poi pol poo pop por pos ppd ppe ppf ppi ppl ppo ppp ppr pps prd pre prf pri prl pro prp prr prs ps- psd pse psf psi psl pso psp psr pss rdd rde rdf rdi rdl rdo rdp rdr rds re- red ree ref rei rel reo rep rer res rfd rfe rff rfi rfl rfo rfp rfr rfs rid rie rif rii ril rio rip rir ris rld rle rlf rli rll rlo rlp rlr rls rod roe rof roi rol roo rop ror ros rpd rpe rpf rpi rpl rpo rpp rpr rps rrd rrf rri rrl rrp rrr rrs rsd rse rsf rsi rsl rso rsp rsr rss sdd sde sdf sdi sdl sdo sdp sdr sds se- sed see sef sei sel seo sep ser ses sfd sfe sff sfi sfl sfo sfp sfr sfs sid sie sif sii sil sio sip sir sis sld sle slf sli sll slo slp slr sls sod soe sof soi sol soo sop sor sos spd spe spf spi spl spo spp spr sps sr- srd sre srf sri srl sro srp srr srs ss- ssd sse ssf ssi ssl sso ssp ssr sss