-er eee eef eeg een eep eer eex ef- efe eff efg efi efp efr efx ege egf egg egi egn egp egr egx eie eif eig eii ein eip eir eix en- ene enf eng eni enn enp enr ep- epe epf epg epi epn epp epr epx ere erf erg eri ern erp err ex- exe exi exp exr exx fee fef feg fei fen fep fer fex ffe fff ffg ffi ffn ffp ffr ffx fge fgf fgg fgi fgn fgp fgr fie fif fig fii fin fip fir fix fne fnf fng fni fnn fnp fnr fnx fpe fpg fpi fpn fpp fpr fpx fre frf frg fri frn frp frr fxe fxg fxi fxp fxr fxx g-p ge- gee gef geg gei gen gep ger gex gfe gff gfi gfp gfr gfx ggg ggi ggn ggp ggr gie gif gig gii gin gip gir gne gnf gni gnn gnp gnr gpe gpf gpg gpi gpn gpp gpr gpx gre grf grg gri grn grp grr grx gxf gxp i-f ie- iee ief ieg iei ien iep ier iex ife iff ifg ifi ifn ifp ifr ifx ige igf igg igi ign igp igr iie iif iii iin iip iir iix in- ine inf ing ini inn inp inr inx ipe ipf ipg ipi ipn ipp ipr ipx ir- ire irf irg iri irn irp irr irx ixe ixi ixn n-i ne- nee nef neg nei nen nep ner nex nfe nff nfi nfn nfp nfr nge ngf ngg ngi ngn ngp nie nif nig nii nin nip nir nix nne nnf nng nni nnn nnp npe npf npg npi npn npp npr nre nrf nrg nri nrn nrp nrr nrx p-p pee pef peg pei pen pep per pex pfe pff pfg pfi pfn pfp pfr pfx pge pgf pgg pgi pgn pgp pgr pie pif pig pii pin pip pir pix pn- pne pnf png pni pnn pnp pnr pnx ppe ppf ppg ppi ppn ppp ppr ppx pre prf prg pri prn prp prr prx pxe pxg pxr re- ree ref reg rei ren rep rer rex rfe rff rfg rfi rfn rfp rfr rge rgf rgg rgi rgn rgp rgr rgx rie rif rig rii rin rip rir rix rng rni rnn rnp rnr rpe rpf rpg rpi rpn rpp rpr rpx rrf rrg rri rrn rrp rrr rxp rxr xee xeg xen xep xer xex xfe xfn xfx xge xgi xgp xie xii xin xix xpe xpf xpg xpn xpp xrf xrx xxi xxp xxx