-er eee eef eem eeo eep eer ees eev ef- efe eff efm efo efp efr efs em- eme emf emm emo emp emr ems emv eo- eoe eof eom eoo eop eor eos ep- epe epf epm epo epp epr eps ere erf erm ero erp err ers erv es- ese esf esm eso esp esr ess esv eve evf evm evo evp evr evs evv fee fef fem feo fep fer fes fev ffe fff ffm ffo ffp ffr ffs ffv fme fmf fmm fmo fmp fmr fms fmv foe fof fom foo fop for fos fpe fpm fpo fpp fpr fps fpv fre frf frm fro frp frr frs fse fsf fsm fso fsp fsr fss fsv fvp m-f m-o m-r m-v mee mef mem meo mep mer mes mev mfe mff mfm mfo mfp mfr mfs mfv mme mmf mmm mmo mmp mmr mms mmv moe mof mom moo mop mor mos mov mpe mpf mpm mpo mpp mpr mps mpv mre mrf mrm mro mrp mrr mrs mrv mse msf msm mso msp msr mss msv mve mvf mvm mvo mvp mvr mvs mvv oee oef oem oeo oep oer oes of- ofe off ofm ofo ofp ofr ofs ofv om- ome omf omm omo omp omr oms omv oo- oof oom ooo oop oor oos oov op- ope opf opm opo opp opr ops opv or- ore orf orm oro orp orr ors orv os- ose osf osm oso osp osr oss osv ov- ove ovf ovo ovp ovs ovv p-p pee pef pem peo pep per pes pev pfe pff pfm pfo pfp pfr pfs pfv pme pmf pmm pmo pmp pmr pms pmv poe pof pom poo pop por pos pov ppe ppf ppm ppo ppp ppr pps ppv pre prf prm pro prp prr prs prv ps- pse psf psm pso psp psr pss psv pve pvf pvm pvo pvp pvr pvs pvv re- ree ref rem reo rep rer res rev rfe rff rfm rfo rfp rfr rfs rfv rme rmf rmm rmo rmp rmr rms rmv roe rof rom roo rop ror ros rov rpe rpf rpm rpo rpp rpr rps rpv rrf rrm rrp rrr rrs rse rsf rsm rso rsp rsr rss rsv rve rvf rvm rvo rvp rvr rvs rvv se- see sef sem seo sep ser ses sev sfe sff sfm sfo sfp sfr sfs sfv sme smf smm smo smp smr sms smv soe sof som soo sop sor sos sov spe spf spm spo spp spr sps spv sr- sre srf srm sro srp srr srs srv ss- sse ssf ssm sso ssp ssr sss ssv sve svf svm svo svp svr svs svv v-e vee vef vem veo vep ver ves vff vfm vfp vfr vfs vfv vm- vmf vmm vmo vmr voe vof vom voo vop vor vos vov vpe vpf vpm vpo vpp vpr vps vre vrf vrm vrp vrr vrs vse vsf vsm vso vsp vsr vss vsv vvm vvo vvr vvs vvv