a-a a-z aaa aam aao aax aay aaz ama amm amo amx amy amz aoa aom aoo aox ax- axa axm axo axx ay- aya ayo ayx ayz az- aza azm azo azx azy azz m-o maa mam mao max may maz mma mmm mmo mmx mmz moa mom moo mox moy moz mxa my- mya mym myo myx mza mzm mzx oaa oam oao oax om- oma omm omo omx omy omz oo- ooa oom ooo oox ox- oxa oxo oxx oxy oya oyo oza ozm ozo ozz xaa xam xma xmm xmo xmx xoa xom xoo xox xxo xxx xxy xyy xyz yaa yam yao yax yay yaz yma ymm ymo yom yoo yox yoy yxa yxy yyy yyz yzy zaa zam zao zax zay zaz zma zmm zo- zoa zom zoo zox zxx zym zyx zzx zzy zzz