-er ddd dde ddk ddl ddr dds de- ded dee dek del der des dke dkk dkl dkr dks dl- dld dle dlk dll dlr dls drd dre drk drl drr drs dsd dse dsk dsl dsr dss ed- edd ede edk edl edr eds eed eee eek eel eer ees ekd eke ekl ekr eks eld ele elk ell elr els erd ere erk erl err ers es- esd ese esk esl esr ess kde kdk kdl kdr kds ke- ked kee kek kel ker kes kke kkk kkl kkr kks kl- kld klr kls krd krk krl krr krs ksd kse ksk ksl ksr kss ldd lde ldk ldl ldr lds led lee lek lel ler les lkl lkr lks lld lle llk lll llr lls lrd lrk lrr lrs lsd lse lsk lsl lsr lss rdd rde rdl rdr rds re- red ree rek rel rer res rke rkk rks rld rle rll rlr rls rrd rrk rrl rrr rrs rsd rse rsk rsl rsr rss sdd sde sdk sdl sdr sds se- sed see sek sel ser ses sk- skd ske skk skl skr sks sld sle slk sll slr sls sr- srd sre srk srl srr srs ss- ssd sse ssk ssl ssr sss