ddd dde ddm ddo ddx ddz de- ded dee dem deo dex dez dmd dme dmm dmo dmx dmz dod doe dom doo dox doz dxd dxo dxx dzd dze dzo ed- edd ede edm edo edx eed eee eem eeo eex em- emd eme emm emo emx eo- eod eoe eom eoo ex- exd exe exo exx eze ezo ezz m-o mdd mde mdm mdo mdx mdz med mee mem meo mex mez mmd mme mmm mmo mmx mmz mod moe mom moo mox moz mxd mzm mzx odd ode odm odo oed oee oem oeo oex om- omd ome omm omo omx omz oo- ood oom ooo oox ox- oxo oxx oze ozm ozo ozz xde xdm xed xee xem xex xmd xmm xmo xmx xod xom xoo xox xxo xxx zdm zed zee zem zeo zez zmd zmm zo- zod zoe zom zoo zox zxx zzx zzz