-er eee eef een eeo eer eex ef- efe eff efi efo efr efx eie eif eii ein eio eir eix en- ene enf eni enn eno enr eo- eoe eof eoi eon eoo eor ere erf eri ern ero err ex- exe exi exo exr exx fee fef fei fen feo fer fex ffe fff ffi ffn ffo ffr ffx fie fif fii fin fir fix fne fnf fni fnn fnr fnx foe fof foi fon foo for fox fre frf fri frn fro frr fxe fxi fxr fxx i-f ie- iee ief iei ien ier iex ife iff ifi ifn ifo ifr ifx iie iif iii iin iio iir iix in- ine inf ini inn ino inr inx io- ioe iof ioi ion ioo ior ir- ire irf iri irn iro irr irx ixe ixi ixn n-i ne- nee nef nei nen neo ner nex nfe nff nfi nfn nfo nfr nie nif nii nin nio nir nix nne nnf nni nnn nno no- noe nof noi non noo nor nox nre nrf nri nrn nro nrr nrx o-i oee oef oei oen oeo oer oex of- ofe off ofi ofn ofo ofr ofx oie oif oii oin oio oir on- one onf oni onn ono onr onx oo- oof ooi oon ooo oor oox or- ore orf ori orn oro orr orx ox- oxf oxi oxn oxo oxx re- ree ref rei ren reo rer rex rfe rff rfi rfn rfo rfr rie rif rii rin rio rir rix rni rnn rno rnr roe rof roi ron roo ror rox rrf rri rrn rrr rxr xee xen xer xex xfe xfn xfx xie xii xin xio xix xno xof xoi xon xoo xor xox xrf xrx xxi xxo xxx