-er ddd dde ddf ddg ddi ddk ddl ddr dds de- ded dee def deg dei dek del der des dfd dfe dff dfg dfi dfk dfl dfr dfs dgd dge dgf dgg dgi dgk dgl dgr dgs di- did die dif dig dii dik dil dir dis dke dkg dki dkk dkl dkr dks dl- dld dle dlf dlg dli dlk dll dlr dls drd dre drg dri drk drl drr drs dsd dse dsf dsg dsi dsk dsl dsr dss ed- edd ede edf edg edi edk edl edr eds eed eee eef eeg eek eel eer ees ef- efd efe eff efg efi efl efr efs egd ege egf egg egi egl egr egs eid eie eif eig eii eik eil eir eis ekd eke ekf ekg eki ekl ekr eks eld ele elf elg eli elk ell elr els erd ere erf erg eri erk erl err ers es- esd ese esf esg esi esk esl esr ess fdd fde fdf fdg fdi fdk fdl fdr fds fed fee fef feg fei fek fel fer fes ffd ffe fff ffg ffi ffk ffl ffr ffs fgd fge fgf fgg fgi fgl fgr fgs fid fie fif fig fii fik fil fir fis fkf fkg fki fkk fkl fld fle flf flg fli fll flr fls frd fre frf frg fri frk frl frr frs fsd fse fsf fsg fsi fsk fsl fsr fss g-d gdd gde gdf gdi gdk gdl gdr gds ge- ged gee gef geg gei gek gel ger ges gfd gfe gff gfi gfk gfl gfr gfs ggd ggg ggi ggr ggs gid gie gif gig gii gik gil gir gis gkd gks gld gle glf glg gli glk gll glr gls grd gre grf grg gri grk grl grr grs gsd gse gsf gsg gsi gsk gsl gsr gss i-d i-f idd ide idf idg idi idk idl idr ids ie- ied iee ief ieg iei iek iel ier ies ifd ife iff ifg ifi ifl ifr ifs igd ige igf igg igi igk igl igr igs iid iie iif iii iil iir iis ike ikf iki ikk ikl ikr iks il- ild ile ilf ilg ili ilk ill ilr ils ir- ird ire irf irg iri irk irl irr irs is- isd ise isf isg isi isk isl isr iss kde kdf kdg kdk kdl kdr kds ke- ked kee kef keg kei kek kel ker kes kfd kff kfg kfi kfs kgd kgf kgi kgl kgs kid kie kif kig kii kik kil kir kis kke kki kkk kkl kkr kks kl- kld klf klg kli klr kls krd krf krg kri krk krl krr krs ksd kse ksf ksg ksi ksk ksl ksr kss ldd lde ldf ldg ldi ldk ldl ldr lds led lee lef leg lei lek lel ler les lfd lfe lff lfg lfi lfk lfl lfr lfs lgd lge lgf lgg lgi lgk lgl lgr lgs lid lie lif lig lii lik lil lir lis lkg lkl lkr lks lld lle llf llg lli llk lll llr lls lrd lrf lrg lri lrk lrr lrs lsd lse lsf lsg lsi lsk lsl lsr lss rdd rde rdf rdg rdi rdl rdr rds re- red ree ref reg rei rek rel rer res rfd rfe rff rfg rfi rfk rfl rfr rfs rgd rge rgf rgg rgi rgk rgr rgs rid rie rif rig rii rik ril rir ris rke rkf rkg rkk rks rld rle rlf rlg rli rll rlr rls rrd rrf rrg rri rrk rrl rrr rrs rsd rse rsf rsg rsi rsk rsl rsr rss sdd sde sdf sdg sdi sdk sdl sdr sds se- sed see sef seg sei sek sel ser ses sfd sfe sff sfg sfi sfk sfl sfr sfs sgd sge sgf sgg sgi sgk sgl sgr sgs sid sie sif sig sii sik sil sir sis sk- skd ske skf skg ski skk skl skr sks sld sle slf slg sli slk sll slr sls sr- srd sre srf srg sri srk srl srr srs ss- ssd sse ssf ssg ssi ssk ssl ssr sss