-er -ey eee eef een eeo eep eer eex eey ef- efe eff efi efo efp efr efx eie eif eii ein eio eip eir eix en- ene enf eni enn eno enp enr eny eo- eoe eof eoi eon eoo eop eor ep- epe epf epi epn epo epp epr epx ere erf eri ern ero erp err ery ex- exe exi exo exp exr exx exy eye eyn eyo eyp eyr fee fef fei fen feo fep fer fex fey ffe fff ffi ffn ffo ffp ffr ffx ffy fie fif fii fin fip fir fix fne fnf fni fnn fnp fnr fnx foe fof foi fon foo fop for fox foy fpe fpi fpn fpo fpp fpr fpx fpy fre frf fri frn fro frp frr fry fxe fxi fxp fxr fxx fy- fye fyi fyn fyo fyp i-f ie- iee ief iei ien iep ier iex iey ife iff ifi ifn ifo ifp ifr ifx ify iie iif iii iin iio iip iir iix in- ine inf ini inn ino inp inr inx iny io- ioe iof ioi ion ioo iop ior ipe ipf ipi ipn ipo ipp ipr ipx ipy ir- ire irf iri irn iro irp irr irx iry ixe ixi ixn ixy iye iyo iyr iyy n-i ne- nee nef nei nen neo nep ner nex ney nfe nff nfi nfn nfo nfp nfr nie nif nii nin nio nip nir nix nne nnf nni nnn nno nnp no- noe nof noi non noo nop nor nox noy npe npf npi npn npo npp npr nre nrf nri nrn nro nrp nrr nrx nry nye nyf nyn nyo nyp nyx nyy o-i oee oef oei oen oeo oep oer oex oey of- ofe off ofi ofn ofo ofp ofr ofx oie oif oii oin oio oip oir on- one onf oni onn ono onp onr onx ony oo- oof ooi oon ooo oop oor oox op- ope opf opi opn opo opp opr opx opy or- ore orf ori orn oro orp orr orx ory ox- oxf oxi oxn oxo oxx oxy oye oyi oyo p-p pee pef pei pen peo pep per pex pey pfe pff pfi pfn pfo pfp pfr pfx pfy pie pif pii pin pio pip pir pix pn- pne pnf pni pnn pno pnp pnr pnx pny poe pof poi pon poo pop por pox poy ppe ppf ppi ppn ppo ppp ppr ppx pre prf pri prn pro prp prr prx pry pxe pxr py- pye pyf pyn pyo pyr pyx re- ree ref rei ren reo rep rer rex rey rfe rff rfi rfn rfo rfp rfr rie rif rii rin rio rip rir rix riy rni rnn rno rnp rnr rny roe rof roi ron roo rop ror rox roy rpe rpf rpi rpn rpo rpp rpr rpx rrf rri rrn rrp rrr rxp rxr ry- rye ryf ryn ryo ryr ryy xee xen xep xer xex xfe xfn xfx xie xii xin xio xix xno xof xoi xon xoo xop xor xox xpe xpf xpn xpo xpp xrf xrx xry xxi xxo xxp xxx xxy xyp xyr xyy yee yef yei yen yeo yep yer yex yey yfe yff yfr yie yif yii yin yio yip yir yne ynn ynp yny yoe yof yoi yon yoo yop yor yox yoy ypf ypo yre yrf yrn yro yrp yxe yxy yye yyf yyy