-er eee eef een eep eer eev ef- efe eff efi efp efr eie eif eii ein eip eir eiv en- ene enf eni enn enp enr env ep- epe epf epi epn epp epr ere erf eri ern erp err erv eve evf evi evn evp evr evv fee fef fei fen fep fer fev ffe fff ffi ffn ffp ffr ffv fie fif fii fin fip fir fne fnf fni fnn fnp fnr fnv fpe fpi fpn fpp fpr fpv fre frf fri frn frp frr fvp i-f i-v ie- iee ief iei ien iep ier iev ife iff ifi ifn ifp ifr iie iif iii iin iip iir in- ine inf ini inn inp inr inv ipe ipf ipi ipn ipp ipr ipv ir- ire irf iri irn irp irr irv ive ivf ivi ivp ivr ivv n-i ne- nee nef nei nen nep ner nev nfe nff nfi nfn nfp nfr nfv nie nif nii nin nip nir niv nne nnf nni nnn nnp nnv npe npf npi npn npp npr npv nre nrf nri nrn nrp nrr nrv nve nvi nvn nvp nvv p-p pee pef pei pen pep per pev pfe pff pfi pfn pfp pfr pfv pie pif pii pin pip pir piv pn- pne pnf pni pnn pnp pnr pnv ppe ppf ppi ppn ppp ppr ppv pre prf pri prn prp prr prv pve pvf pvi pvn pvp pvr pvv re- ree ref rei ren rep rer rev rfe rff rfi rfn rfp rfr rfv rie rif rii rin rip rir riv rni rnn rnp rnr rnv rpe rpf rpi rpn rpp rpr rpv rrf rri rrn rrp rrr rve rvf rvi rvn rvp rvr rvv v-e vee vef vei ven vep ver vff vfi vfn vfp vfr vfv vi- vie vif vii vin vip vir viv vn- vnf vni vnp vnr vnv vpe vpf vpi vpn vpp vpr vre vrf vri vrn vrp vrr vvi vvr vvv