-er -ol eee eef eek eel eeo eep eer ees ef- efe eff efl efo efp efr efs eke ekf ekl eko ekp ekr eks ele elf elk ell elo elp elr els eo- eoe eof eok eol eoo eop eor eos ep- epe epf epl epo epp epr eps ere erf erk erl ero erp err ers es- ese esf esk esl eso esp esr ess fee fef fek fel feo fep fer fes ffe fff ffk ffl ffo ffp ffr ffs fkf fkk fkl fkp fle flf fll flo flp flr fls foe fof fok fol foo fop for fos fpe fpk fpl fpo fpp fpr fps fre frf frk frl fro frp frr frs fse fsf fsk fsl fso fsp fsr fss ke- kee kef kek kel keo kep ker kes kff kfo kfs kke kkk kkl kkp kkr kks kl- klf klo klr kls koe kof kok kol koo kop kor kos kpe kpf kpk kpl kpo kpp kpr kps krf krk krl kro krp krr krs kse ksf ksk ksl kso ksp ksr kss l-p lee lef lek lel leo lep ler les lfe lff lfk lfl lfo lfp lfr lfs lkl lkp lkr lks lle llf llk lll llo llp llr lls loe lof lok lol loo lop lor los lpe lpf lpk lpl lpo lpp lpr lps lrf lrk lro lrp lrr lrs lse lsf lsk lsl lso lsp lsr lss oee oef oel oeo oep oer oes of- ofe off ofl ofo ofp ofr ofs oke okk okl oko okp okr oks ole olf olk oll olo olp ols oo- oof ook ool ooo oop oor oos op- ope opf opk opl opo opp opr ops or- ore orf ork orl oro orp orr ors os- ose osf osk osl oso osp osr oss p-p pee pef pek pel peo pep per pes pfe pff pfk pfl pfo pfp pfr pfs pke pkf pkl pko pkp pkr pks ple plf plk pll plo plp plr pls poe pof pok pol poo pop por pos ppe ppf ppk ppl ppo ppp ppr pps pre prf prk prl pro prp prr prs ps- pse psf psk psl pso psp psr pss re- ree ref rek rel reo rep rer res rfe rff rfk rfl rfo rfp rfr rfs rke rkf rkk rko rkp rks rle rlf rll rlo rlp rlr rls roe rof rok rol roo rop ror ros rpe rpf rpk rpl rpo rpp rpr rps rrf rrk rrl rrp rrr rrs rse rsf rsk rsl rso rsp rsr rss se- see sef sek sel seo sep ser ses sfe sff sfk sfl sfo sfp sfr sfs sk- ske skf skk skl sko skp skr sks sle slf slk sll slo slp slr sls soe sof sok sol soo sop sor sos spe spf spk spl spo spp spr sps sr- sre srf srk srl sro srp srr srs ss- sse ssf ssk ssl sso ssp ssr sss