-er -ol eee eef eel eeo eep eer ees ef- efe eff efl efo efp efr efs ele elf ell elo elp elr els eo- eoe eof eol eoo eop eor eos ep- epe epf epl epo epp epr eps ere erf erl ero erp err ers es- ese esf esl eso esp esr ess fee fef fel feo fep fer fes ffe fff ffl ffo ffp ffr ffs fle flf fll flo flp flr fls foe fof fol foo fop for fos fpe fpl fpo fpp fpr fps fre frf frl fro frp frr frs fse fsf fsl fso fsp fsr fss l-p lee lef lel leo lep ler les lfe lff lfl lfo lfp lfr lfs lle llf lll llo llp llr lls loe lof lol loo lop lor los lpe lpf lpl lpo lpp lpr lps lrf lro lrp lrr lrs lse lsf lsl lso lsp lsr lss oee oef oel oeo oep oer oes of- ofe off ofl ofo ofp ofr ofs ole olf oll olo olp ols oo- oof ool ooo oop oor oos op- ope opf opl opo opp opr ops or- ore orf orl oro orp orr ors os- ose osf osl oso osp osr oss p-p pee pef pel peo pep per pes pfe pff pfl pfo pfp pfr pfs ple plf pll plo plp plr pls poe pof pol poo pop por pos ppe ppf ppl ppo ppp ppr pps pre prf prl pro prp prr prs ps- pse psf psl pso psp psr pss re- ree ref rel reo rep rer res rfe rff rfl rfo rfp rfr rfs rle rlf rll rlo rlp rlr rls roe rof rol roo rop ror ros rpe rpf rpl rpo rpp rpr rps rrf rrl rrp rrr rrs rse rsf rsl rso rsp rsr rss se- see sef sel seo sep ser ses sfe sff sfl sfo sfp sfr sfs sle slf sll slo slp slr sls soe sof sol soo sop sor sos spe spf spl spo spp spr sps sr- sre srf srl sro srp srr srs ss- sse ssf ssl sso ssp ssr sss