a-a aaa aad aae aaf aam aao aax ad- ada add ade adf adm ado adx aea aed aee aef aem aeo aex af- afa afd afe aff afm afo afx ama amd ame amf amm amo amx aoa aod aoe aof aom aoo aox ax- axa axe axm axo axx daa dad dae daf dam dao dax dda ddd dde ddf ddm ddo ddx de- dea ded dee def dem deo dex dfa dfd dfe dff dfm dfo dfx dma dmd dme dmf dmm dmo dmx doa dod doe dof dom doo dox dxd dxo dxx eaa ead eae eaf eam eao eax ed- eda edd ede edf edm edo edx eea eed eee eef eem eeo eex ef- efa efd efe eff efm efo efx em- ema emd eme emf emm emo emx eo- eoa eod eoe eof eom eoo ex- exa exd exe exo exx faa fad fae faf fam fao fax fda fdd fde fdf fdm fdo fdx fea fed fee fef fem feo fex ffa ffd ffe fff ffm ffo ffx fma fmd fme fmf fmm fmo fmx foa foe fof fom foo fox fxe fxm fxx m-f m-o maa mad mae maf mam mao max mda mdd mde mdf mdm mdo mdx mea med mee mef mem meo mex mfa mfd mfe mff mfm mfo mma mmd mme mmf mmm mmo mmx moa mod moe mof mom moo mox mxa mxd oaa oad oae oaf oam oao oax oda odd ode odf odm odo oea oed oee oef oem oeo oex of- ofa ofd ofe off ofm ofo ofx om- oma omd ome omf omm omo omx oo- ooa ood oof oom ooo oox ox- oxa oxf oxo oxx xaa xad xaf xam xda xde xdf xdm xed xee xem xex xfa xfe xfm xfx xma xmd xmf xmm xmo xmx xoa xod xof xom xoo xox xxo xxx