a-a aaa aad aaf aam aao aax ad- ada add adf adm ado adx af- afa afd aff afm afo afx ama amd amf amm amo amx aoa aod aof aom aoo aox ax- axa axm axo axx daa dad daf dam dao dax dda ddd ddf ddm ddo ddx dfa dfd dff dfm dfo dfx dma dmd dmf dmm dmo dmx doa dod dof dom doo dox dxd dxo dxx faa fad faf fam fao fax fda fdd fdf fdm fdo fdx ffa ffd fff ffm ffo ffx fma fmd fmf fmm fmo fmx foa fof fom foo fox fxm fxx m-f m-o maa mad maf mam mao max mda mdd mdf mdm mdo mdx mfa mfd mff mfm mfo mma mmd mmf mmm mmo mmx moa mod mof mom moo mox mxa mxd oaa oad oaf oam oao oax oda odd odf odm odo of- ofa ofd off ofm ofo ofx om- oma omd omf omm omo omx oo- ooa ood oof oom ooo oox ox- oxa oxf oxo oxx xaa xad xaf xam xda xdf xdm xfa xfm xfx xma xmd xmf xmm xmo xmx xoa xod xof xom xoo xox xxo xxx