eee eef eem een eep ef- efe eff efi efm efp eie eif eii eim ein eip em- eme emf emi emm emn emp en- ene enf eni enm enn enp ep- epe epf epi epm epn epp fee fef fei fem fen fep ffe fff ffi ffm ffn ffp fie fif fii fim fin fip fme fmf fmi fmm fmn fmp fne fnf fni fnm fnn fnp fpe fpi fpm fpn fpp i-f ie- iee ief iei iem ien iep ife iff ifi ifm ifn ifp iie iif iii iim iin iip im- ime imf imi imm imn imp in- ine inf ini inm inn inp ipe ipf ipi ipm ipn ipp m-f mee mef mei mem men mep mfe mff mfi mfm mfn mfp mi- mie mif mii mim min mip mme mmf mmi mmm mmn mmp mne mnf mni mnm mnn mnp mpe mpf mpi mpm mpn mpp n-i ne- nee nef nei nem nen nep nfe nff nfi nfn nfp nie nif nii nim nin nip nme nmi nmm nmn nmp nne nnf nni nnm nnn nnp npe npf npi npm npn npp p-p pee pef pei pem pen pep pfe pff pfi pfm pfn pfp pie pif pii pim pin pip pme pmf pmi pmm pmn pmp pn- pne pnf pni pnm pnn pnp ppe ppf ppi ppm ppn ppp