-er -ol eee eef eek eel eeo eer ees eet ef- efe eff efl efo efr efs eft eke ekf ekl eko ekr eks ekt ele elf elk ell elo elr els elt eo- eoe eof eok eol eoo eor eos eot ere erf erk erl ero err ers ert es- ese esf esk esl eso esr ess est ete etf etk etl eto etr ets ett fee fef fek fel feo fer fes fet ffe fff ffk ffl ffo ffr ffs fft fkf fkk fkl fkt fle flf fll flo flr fls flt foe fof fok fol foo for fos fot fre frf frk frl fro frr frs frt fse fsf fsk fsl fso fsr fss fst fte ftf ftk ftl fto ftr fts ftt k-t ke- kee kef kek kel keo ker kes ket kff kfo kfs kke kkk kkl kkr kks kkt kl- klf klo klr kls klt koe kof kok kol koo kor kos kot krf krk krl kro krr krs krt kse ksf ksk ksl kso ksr kss kst kte ktf ktk ktl kto ktr kts ktt lee lef lek lel leo ler les let lfe lff lfk lfl lfo lfr lfs lft lkl lkr lks lkt lle llf llk lll llo llr lls llt loe lof lok lol loo lor los lot lrf lrk lro lrr lrs lrt lse lsf lsk lsl lso lsr lss lst lte ltf ltk ltl lto ltr lts ltt oee oef oel oeo oer oes oet of- ofe off ofl ofo ofr ofs oft oke okk okl oko okr oks ole olf olk oll olo ols olt oo- oof ook ool ooo oor oos oot or- ore orf ork orl oro orr ors ort os- ose osf osk osl oso osr oss ost ot- ote otf otk otl oto otr ots ott re- ree ref rek rel reo rer res ret rfe rff rfk rfl rfo rfr rfs rft rke rkf rkk rko rks rkt rle rlf rll rlo rlr rls rlt roe rof rok rol roo ror ros rot rrf rrk rrl rrr rrs rrt rse rsf rsk rsl rso rsr rss rst rte rtf rtk rtl rto rtr rts rtt se- see sef sek sel seo ser ses set sfe sff sfk sfl sfo sfr sfs sft sk- ske skf skk skl sko skr sks skt sle slf slk sll slo slr sls slt soe sof sok sol soo sor sos sot sr- sre srf srk srl sro srr srs srt ss- sse ssf ssk ssl sso ssr sss sst ste stf stk stl sto str sts stt te- tee tef tek tel teo ter tes tet tfe tff tfk tfl tfo tfr tfs tft tke tkk tkl tko tkr tks tkt tle tlf tlk tll tlo tlr tls tlt to- toe tof tok tol too tor tos tot tre trf trk trl tro trr trs trt tse tsf tsk tsl tso tsr tss tst tte ttf ttk ttl tto ttr tts ttt