eee eef eem eep eev ef- efe eff efi efm efp eie eif eii eim eip eiv em- eme emf emi emm emp emv ep- epe epf epi epm epp eve evf evi evm evp evv fee fef fei fem fep fev ffe fff ffi ffm ffp ffv fie fif fii fim fip fme fmf fmi fmm fmp fmv fpe fpi fpm fpp fpv fvp i-f i-v ie- iee ief iei iem iep iev ife iff ifi ifm ifp iie iif iii iim iip im- ime imf imi imm imp imv ipe ipf ipi ipm ipp ipv ive ivf ivi ivp ivv m-f m-v mee mef mei mem mep mev mfe mff mfi mfm mfp mfv mi- mie mif mii mim mip miv mme mmf mmi mmm mmp mmv mpe mpf mpi mpm mpp mpv mve mvf mvi mvm mvp mvv p-p pee pef pei pem pep pev pfe pff pfi pfm pfp pfv pie pif pii pim pip piv pme pmf pmi pmm pmp pmv ppe ppf ppi ppm ppp ppv pve pvf pvi pvm pvp pvv v-e vee vef vei vem vep vff vfi vfm vfp vfv vi- vie vif vii vim vip viv vm- vmf vmi vmm vpe vpf vpi vpm vpp vvi vvm vvv