-er -ol ddd dde ddf ddi ddk ddl ddo ddp ddr dds de- ded dee def dei dek del deo dep der des dfd dfe dff dfi dfk dfl dfo dfp dfr dfs di- did die dif dii dik dil dio dip dir dis dke dki dkk dkl dko dkp dkr dks dl- dld dle dlf dli dlk dll dlo dlp dlr dls dod doe dof doi dok dol doo dop dor dos dpd dpe dpf dpi dpk dpl dpo dpp dpr dps drd dre dri drk drl dro drp drr drs dsd dse dsf dsi dsk dsl dso dsp dsr dss ed- edd ede edf edi edk edl edo edp edr eds eed eee eef eek eel eeo eep eer ees ef- efd efe eff efi efl efo efp efr efs eid eie eif eii eik eil eio eip eir eis ekd eke ekf eki ekl eko ekp ekr eks eld ele elf eli elk ell elo elp elr els eo- eod eoe eof eoi eok eol eoo eop eor eos ep- epd epe epf epi epl epo epp epr eps erd ere erf eri erk erl ero erp err ers es- esd ese esf esi esk esl eso esp esr ess fdd fde fdf fdi fdk fdl fdo fdp fdr fds fed fee fef fei fek fel feo fep fer fes ffd ffe fff ffi ffk ffl ffo ffp ffr ffs fid fie fif fii fik fil fip fir fis fkf fki fkk fkl fkp fld fle flf fli fll flo flp flr fls foe fof foi fok fol foo fop for fos fpd fpe fpi fpk fpl fpo fpp fpr fps frd fre frf fri frk frl fro frp frr frs fsd fse fsf fsi fsk fsl fso fsp fsr fss i-d i-f idd ide idf idi idk idl ido idp idr ids ie- ied iee ief iei iek iel iep ier ies ifd ife iff ifi ifl ifo ifp ifr ifs iid iie iif iii iil iio iip iir iis ike ikf iki ikk ikl iko ikr iks il- ild ile ilf ili ilk 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 irk irl iro irp irr irs is- isd ise isf isi isk isl iso isp isr iss kde kdf kdk kdl kdo kdp kdr kds ke- ked kee kef kei kek kel keo kep ker kes kfd kff kfi kfo kfs kid kie kif kii kik kil kio kip kir kis kke kki kkk kkl kkp kkr kks kl- kld klf kli klo klr kls kod koe kof koi kok kol koo kop kor kos kpd kpe kpf kpi kpk kpl kpo kpp kpr kps krd krf kri krk krl kro krp krr krs ksd kse ksf ksi ksk ksl kso ksp ksr kss l-p ldd lde ldf ldi ldk ldl ldo ldp ldr lds led lee lef lei lek lel leo lep ler les lfd lfe lff lfi lfk lfl lfo lfp lfr lfs lid lie lif lii lik lil lio lip lir lis lkl lkp lkr lks lld lle llf lli llk lll llo llp llr lls lod loe lof loi lok lol loo lop lor los lpd lpe lpf lpi lpk lpl lpo lpp lpr lps lrd lrf lri lrk lro lrp lrr lrs lsd lse lsf lsi lsk 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 oik oil oio oip oir ois okd oke oki okk okl oko okp okr oks old ole olf oli olk oll olo olp ols oo- ood oof ooi ook ool ooo oop oor oos op- opd ope opf opi opk opl opo opp opr ops or- ord ore orf ori ork orl oro orp orr ors os- osd ose osf osi osk osl oso osp osr oss p-p pdd pde pdf pdi pdk pdl pdo pdp pdr pds ped pee pef pei pek pel peo pep per pes pfd pfe pff pfi pfk pfl pfo pfp pfr pfs pid pie pif pii pik pil pio pip pir pis pkd pke pkf pki pkl pko pkp pkr pks pld ple plf pli plk pll plo plp plr pls pod poe pof poi pok pol poo pop por pos ppd ppe ppf ppi ppk ppl ppo ppp ppr pps prd pre prf pri prk prl pro prp prr prs ps- psd pse psf psi psk psl pso psp psr pss rdd rde rdf rdi rdl rdo rdp rdr rds re- red ree ref rei rek rel reo rep rer res rfd rfe rff rfi rfk rfl rfo rfp rfr rfs rid rie rif rii rik ril rio rip rir ris rke rkf rkk rko rkp rks rld rle rlf rli rll rlo rlp rlr rls rod roe rof roi rok rol roo rop ror ros rpd rpe rpf rpi rpk rpl rpo rpp rpr rps rrd rrf rri rrk rrl rrp rrr rrs rsd rse rsf rsi rsk rsl rso rsp rsr rss sdd sde sdf sdi sdk sdl sdo sdp sdr sds se- sed see sef sei sek sel seo sep ser ses sfd sfe sff sfi sfk sfl sfo sfp sfr sfs sid sie sif sii sik sil sio sip sir sis sk- skd ske skf ski skk skl sko skp skr sks sld sle slf sli slk sll slo slp slr sls sod soe sof soi sok sol soo sop sor sos spd spe spf spi spk spl spo spp spr sps sr- srd sre srf sri srk srl sro srp srr srs ss- ssd sse ssf ssi ssk ssl sso ssp ssr sss