-er eee eek eel eer ees eet eke ekl ekr eks ekt ele elk ell elr els elt ere erk erl err ers ert es- ese esk esl esr ess est ete etk etl etr ets ett k-t ke- kee kek kel ker kes ket kke kkk kkl kkr kks kkt kl- klr kls klt krk krl krr krs krt kse ksk ksl ksr kss kst kte ktk ktl ktr kts ktt lee lek lel ler les let lkl lkr lks lkt lle llk lll llr lls llt lrk lrr lrs lrt lse lsk lsl lsr lss lst lte ltk ltl ltr lts ltt re- ree rek rel rer res ret rke rkk rks rkt rle rll rlr rls rlt rrk rrl rrr rrs rrt rse rsk rsl rsr rss rst rte rtk rtl rtr rts rtt se- see sek sel ser ses set sk- ske skk skl skr sks skt sle slk sll slr sls slt sr- sre srk srl srr srs srt ss- sse ssk ssl ssr sss sst ste stk stl str sts stt te- tee tek tel ter tes tet tke tkk tkl tkr tks tkt tle tlk tll tlr tls tlt tre trk trl trr trs trt tse tsk tsl tsr tss tst tte ttk ttl ttr tts ttt