-er -ol eee eef eel eem eeo eer ees ef- efe eff efl efm efo efr efs ele elf ell elm elo elr els em- eme emf eml emm emo emr ems eo- eoe eof eol eom eoo eor eos ere erf erl erm ero err ers es- ese esf esl esm eso esr ess fee fef fel fem feo fer fes ffe fff ffl ffm ffo ffr ffs fle flf fll flm flo flr fls fme fmf fml fmm fmo fmr fms foe fof fol fom foo for fos fre frf frl frm fro frr frs fse fsf fsl fsm fso fsr fss lee lef lel lem leo ler les lfe lff lfl lfm lfo lfr lfs lle llf lll llm llo llr lls lme lmf lml lmm lmo lmr lms loe lof lol lom loo lor los lrf lrm lro lrr lrs lse lsf lsl lsm lso lsr lss m-f m-o m-r mee mef mel mem meo mer mes mfe mff mfl mfm mfo mfr mfs mle mlf mll mlm mlo mlr mls mme mmf mml mmm mmo mmr mms moe mof mol mom moo mor mos mre mrf mrl mrm mro mrr mrs mse msf msl msm mso msr mss oee oef oel oem oeo oer oes of- ofe off ofl ofm ofo ofr ofs ole olf oll olm olo ols om- ome omf oml omm omo omr oms oo- oof ool oom ooo oor oos or- ore orf orl orm oro orr ors os- ose osf osl osm oso osr oss re- ree ref rel rem reo rer res rfe rff rfl rfm rfo rfr rfs rle rlf rll rlm rlo rlr rls rme rmf rml rmm rmo rmr rms roe rof rol rom roo ror ros rrf rrl rrm rrr rrs rse rsf rsl rsm rso rsr rss se- see sef sel sem seo ser ses sfe sff sfl sfm sfo sfr sfs sle slf sll slm slo slr sls sme smf sml smm smo smr sms soe sof sol som soo sor sos sr- sre srf srl srm sro srr srs ss- sse ssf ssl ssm sso ssr sss