-er ddd dde ddf ddi ddk ddl ddn ddr dds de- ded dee def dei dek del den der des dfd dfe dff dfi dfk dfl dfn dfr dfs di- did die dif dii dik dil din dir dis dke dki dkk dkl dkr dks dl- dld dle dlf dli dlk dll dlr dls dnd dne dnf dni dnk dnl dnn dnr dns drd dre dri drk drl drn drr drs dsd dse dsf dsi dsk dsl dsn dsr dss ed- edd ede edf edi edk edl edn edr eds eed eee eef eek eel een eer ees ef- efd efe eff efi efl efr efs eid eie eif eii eik eil ein eir eis ekd eke ekf eki ekl ekr eks eld ele elf eli elk ell eln elr els en- end ene enf eni enk enl enn enr ens erd ere erf eri erk erl ern err ers es- esd ese esf esi esk esl esn esr ess fdd fde fdf fdi fdk fdl fdn fdr fds fed fee fef fei fek fel fen fer fes ffd ffe fff ffi ffk ffl ffn ffr ffs fid fie fif fii fik fil fin fir fis fkf fki fkk fkl fld fle flf fli fll fln flr fls fnd fne fnf fni fnk fnl fnn fnr fns frd fre frf fri frk frl frn frr frs fsd fse fsf fsi fsk fsl fsn fsr fss i-d i-f idd ide idf idi idk idl idn idr ids ie- ied iee ief iei iek iel ien ier ies ifd ife iff ifi ifl ifn ifr ifs iid iie iif iii iil iin iir iis ike ikf iki ikk ikl ikr iks il- ild ile ilf ili ilk ill iln ilr ils in- ind ine inf ini ink inl inn inr ins ir- ird ire irf iri irk irl irn irr irs is- isd ise isf isi isk isl isn isr iss kde kdf kdk kdl kdr kds ke- ked kee kef kei kek kel ken ker kes kfd kff kfi kfs kid kie kif kii kik kil kin kir kis kke kki kkk kkl kkn kkr kks kl- kld klf kli klr kls kn- knd kne knf kni knk knl knn knr krd krf kri krk krl krn krr krs ksd kse ksf ksi ksk ksl ksn ksr kss ldd lde ldf ldi ldk ldl ldn ldr lds led lee lef lei lek lel len ler les lfd lfe lff lfi lfk lfl lfn lfr lfs lid lie lif lii lik lil lin lir lis lkl lkr lks lld lle llf lli llk lll lln llr lls lnd lne lni lnk lnl lnn lnr lns lrd lrf lri lrk lrn lrr lrs lsd lse lsf lsi lsk lsl lsn lsr lss n-i ndd nde ndf ndi ndk ndl ndn ndr nds ne- ned nee nef nei nek nel nen ner nes nfd nfe nff nfi nfk nfl nfn nfr nfs nid nie nif nii nik nil nin nir nis nke nkf nki nkk nkn nkr nks nld nle nlf nli nlk nll nln nlr nls nne nnf nni nnk nnl nnn nns nrd nre nrf nri nrk nrl nrn nrr nrs nsd nse nsf nsi nsk nsl nsn nsr nss rdd rde rdf rdi rdl rdn rdr rds re- red ree ref rei rek rel ren rer res rfd rfe rff rfi rfk rfl rfn rfr rfs rid rie rif rii rik ril rin rir ris rke rkf rkk rks rld rle rlf rli rll rln rlr rls rnd rni rnn rnr rns rrd rrf rri rrk rrl rrn rrr rrs rsd rse rsf rsi rsk rsl rsn rsr rss sdd sde sdf sdi sdk sdl sdn sdr sds se- sed see sef sei sek sel sen ser ses sfd sfe sff sfi sfk sfl sfn sfr sfs sid sie sif sii sik sil sin sir sis sk- skd ske skf ski skk skl skr sks sld sle slf sli slk sll sln slr sls snd sne snf sni snk snl snn snr sns sr- srd sre srf sri srk srl srn srr srs ss- ssd sse ssf ssi ssk ssl ssn ssr sss