-er ddd dde ddi ddm ddr ddu ddx de- ded dee dei dem der deu dex di- did die dii dim dir diu dix dmd dme dmi dmm dmr dmu dmx drd dre dri drm drr dru drx dud due dui dum dur dux dxd dxi dxr dxx ed- edd ede edi edm edr edu edx eed eee eem eer eex eid eie eii eim eir eiu eix em- emd eme emi emm emr emu emx erd ere eri erm err eru eu- eud eue eui eur eux ex- exd exe exi exr exu exx i-d idd ide idi idm idr idu idx ie- ied iee iei iem ier iex iid iie iii iim iir iiu iix im- imd ime imi imm imu imx ir- ird ire iri irm irr iru irx iu- iud iue iui ium iur ixe ixi m-r mdd mde mdi mdm mdr mdu mdx med mee mei mem mer meu mex mi- mid mie mii mim mir miu mix mmd mme mmi mmm mmr mmu mmx mrd mre mri mrm mrr mru mrx mud mue mui mum mur muu mux mxd mxi mxr mxu rdd rde rdi rdm rdr rdu rdx re- red ree rei rem rer reu rex rid rie rii rim rir rix rmd rme rmi rmm rmr rmx rrd rri rrm rrr rru rud rue rui rum rur ruu rux rxr udd ude udi udm udr udu udx ued uee uei uem uer uid uie uii uim uir uiu um- umd ume umi umm umr umu ur- urd ure uri urm urr uru urx uue uum uur uuu uxr uxu xde xdi xdm xdr xed xee xem xer xeu xex xie xii xiu xix xmd xmi xmm xmr xmu xmx xrd xrx xue xui xxi xxx