eee eef een eeo eep eev ef- efe eff efi efo efp eie eif eii ein eio eip eiv en- ene enf eni enn eno enp env eo- eoe eof eoi eon eoo eop ep- epe epf epi epn epo epp eve evf evi evn evo evp evv fee fef fei fen feo fep fev ffe fff ffi ffn ffo ffp ffv fie fif fii fin fip fne fnf fni fnn fnp fnv foe fof foi fon foo fop fpe fpi fpn fpo fpp fpv fvp i-f i-v ie- iee ief iei ien iep iev ife iff ifi ifn ifo ifp iie iif iii iin iio iip in- ine inf ini inn ino inp inv io- ioe iof ioi ion ioo iop iov ipe ipf ipi ipn ipo ipp ipv ive ivf ivi ivo ivp ivv n-i ne- nee nef nei nen neo nep nev nfe nff nfi nfn nfo nfp nfv nie nif nii nin nio nip niv nne nnf nni nnn nno nnp nnv no- noe nof noi non noo nop nov npe npf npi npn npo npp npv nve nvi nvn nvp nvv o-i oee oef oei oen oeo oep of- ofe off ofi ofn ofo ofp ofv oie oif oii oin oio oip oiv on- one onf oni onn ono onp oo- oof ooi oon ooo oop oov op- ope opf opi opn opo opp opv ov- ove ovf ovi ovo ovp ovv p-p pee pef pei pen peo pep pev pfe pff pfi pfn pfo pfp pfv pie pif pii pin pio pip piv pn- pne pnf pni pnn pno pnp pnv poe pof poi pon poo pop pov ppe ppf ppi ppn ppo ppp ppv pve pvf pvi pvn pvo pvp pvv v-e vee vef vei ven veo vep vff vfi vfn vfp vfv vi- vie vif vii vin vio vip viv vn- vnf vni vno vnp vnv voe vof voi von voo vop vov vpe vpf vpi vpn vpo vpp vvi vvo vvv