-er ddd dde ddg ddi ddn ddr ddx de- ded dee deg dei den der dex dgd dge dgg dgi dgn dgr di- did die dig dii din dir dix dnd dne dng dni dnn dnr drd dre drg dri drn drr drx dxd dxi dxn dxr dxx ed- edd ede edg edi edn edr edx eed eee eeg een eer eex egd ege egg egi egn egr egx eid eie eig eii ein eir eix en- end ene eng eni enn enr erd ere erg eri ern err ex- exd exe exi exr exx g-d gdd gde gdi gdn gdr gdx ge- ged gee geg gei gen ger gex ggd ggg ggi ggn ggr gid gie gig gii gin gir gnd gne gni gnn gnr grd gre grg gri grn grr grx i-d idd ide idg idi idn idr idx ie- ied iee ieg iei ien ier iex igd ige igg igi ign igr iid iie iii iin iir iix in- ind ine ing ini inn inr inx ir- ird ire irg iri irn irr irx ixe ixi ixn n-i ndd nde ndg ndi ndn ndr ne- ned nee neg nei nen ner nex ngd nge ngg ngi ngn nid nie nig nii nin nir nix nne nng nni nnn nrd nre nrg nri nrn nrr nrx nxd rdd rde rdg rdi rdn rdr rdx re- red ree reg rei ren rer rex rgd rge rgg rgi rgn rgr rgx rid rie rig rii rin rir rix rnd rng rni rnn rnr rrd rrg rri rrn rrr rxr xde xdi xdr xed xee xeg xen xer xex xge xgi xie xii xin xix xrd xrx xxi xxx