-er ddd dde ddi ddm ddn ddp ddr ddx de- ded dee dei dem den dep der dex di- did die dii dim din dip dir dix dmd dme dmi dmm dmn dmp dmr dmx dnd dne dni dnm dnn dnp dnr dpd dpe dpi dpm dpn dpp dpr drd dre dri drm drn drp drr drx dxd dxi dxn dxp dxr dxx ed- edd ede edi edm edn edp edr edx eed eee eem een eep eer eex eid eie eii eim ein eip eir eix em- emd eme emi emm emn emp emr emx en- end ene eni enm enn enp enr ep- epd epe epi epm epn epp epr epx erd ere eri erm ern erp err ex- exd exe exi exp exr exx i-d idd ide idi idm idn idp idr idx ie- ied iee iei iem ien iep ier iex iid iie iii iim iin iip iir iix im- imd ime imi imm imn imp imx in- ind ine ini inm inn inp inr inx ipd ipe ipi ipm ipn ipp ipr ipx ir- ird ire iri irm irn irp irr irx ixe ixi ixn m-r mdd mde mdi mdm mdn mdp mdr mdx med mee mei mem men mep mer mex mi- mid mie mii mim min mip mir mix mmd mme mmi mmm mmn mmp mmr mmx mne mni mnm mnn mnp mnr mpd mpe mpi mpm mpn mpp mpr mpx mrd mre mri mrm mrn mrp mrr mrx mxd mxi mxn mxp mxr n-i ndd nde ndi ndm ndn ndp ndr ne- ned nee nei nem nen nep ner nex nid nie nii nim nin nip nir nix nmd nme nmi nmm nmn nmp nmr nne nni nnm nnn nnp npd npe npi npm npn npp npr nrd nre nri nrm nrn nrp nrr nrx nxd p-p pdd pde pdi pdm pdn pdp pdr pdx ped pee pei pem pen pep per pex pid pie pii pim pin pip pir pix pmd pme pmi pmm pmn pmp pmr pmx pn- pnd pne pni pnm pnn pnp pnr pnx ppd ppe ppi ppm ppn ppp ppr ppx prd pre pri prm prn prp prr prx pxe pxm pxr rdd rde rdi rdm rdn rdp rdr rdx re- red ree rei rem ren rep rer rex rid rie rii rim rin rip rir rix rmd rme rmi rmm rmn rmp rmr rmx rnd rni rnm rnn rnp rnr rpd rpe rpi rpm rpn rpp rpr rpx rrd rri rrm rrn rrp rrr rxp rxr xde xdi xdm xdr xed xee xem xen xep xer xex xie xii xin xix xmd xmi xmm xmp xmr xmx xpd xpe xpm xpn xpp xrd xrx xxi xxp xxx