-er ddd dde ddk ddl ddr de- ded dee dek del der dke dkk dkl dkr dl- dld dle dlk dll dlr drd dre drk drl drr ed- edd ede edk edl edr eed eee eek eel eer ekd eke ekl ekr eld ele elk ell elr erd ere erk erl err kde kdk kdl kdr ke- ked kee kek kel ker kke kkk kkl kkr kl- kld klr krd krk krl krr ldd lde ldk ldl ldr led lee lek lel ler lkl lkr lld lle llk lll llr lrd lrk lrr rdd rde rdl rdr re- red ree rek rel rer rke rkk rld rle rll rlr rrd rrk rrl rrr