-er ddd dde ddi ddk ddm ddn ddr ddx de- ded dee dei dek dem den der dex di- did die dii dik dim din dir dix dke dki dkk dkm dkr dkx dmd dme dmi dmk dmm dmn dmr dmx dnd dne dni dnk dnm dnn dnr drd dre dri drk drm drn drr drx dxd dxi dxn dxr dxx ed- edd ede edi edk edm edn edr edx eed eee eek eem een eer eex eid eie eii eik eim ein eir eix ekd eke eki ekr em- emd eme emi emk emm emn emr emx en- end ene eni enk enm enn enr erd ere eri erk erm ern err ex- exd exe exi exr exx i-d idd ide idi idk idm idn idr idx ie- ied iee iei iek iem ien ier iex iid iie iii iim iin iir iix ike iki ikk ikr ikx im- imd ime imi imm imn imx in- ind ine ini ink inm inn inr inx ir- ird ire iri irk irm irn irr irx ixe ixi ixn kde kdk kdm kdr kdx ke- ked kee kei kek kem ken ker kex kid kie kii kik kim kin kir kix kke kki kkk kkm kkn kkr kmd kme kmi kmk kmm kn- knd kne kni knk knm knn knr knx krd kri krk krn krr kxm m-r mdd mde mdi mdk mdm mdn mdr mdx med mee mei mek mem men mer mex mi- mid mie mii mik mim min mir mix mkd mke mkk mkm mkn mkr mkx mmd mme mmi mmk mmm mmn mmr mmx mne mni mnk mnm mnn mnr mrd mre mri mrk mrm mrn mrr mrx mxd mxi mxn mxr n-i ndd nde ndi ndk ndm ndn ndr ne- ned nee nei nek nem nen ner nex nid nie nii nik nim nin nir nix nke nki nkk nkm nkn nkr nmd nme nmi nmk nmm nmn nmr nne nni nnk nnm nnn nrd nre nri nrk nrm nrn nrr nrx nxd rdd rde rdi rdm rdn rdr rdx re- red ree rei rek rem ren rer rex rid rie rii rik rim rin rir rix rke rkk rkm rmd rme rmi rmm rmn rmr rmx rnd rni rnm rnn rnr rrd rri rrk rrm rrn rrr rxr xde xdi xdk xdm xdr xed xee xem xen xer xex xie xii xin xix xke xmd xmi xmk xmm xmr xmx xnk xrd xrx xxi xxx