a-a a-b a-i aaa aab aae aai aav aax ab- aba abb abe abi abv abx aea aeb aee aei aev aex ai- aia aib aie aii aiv aix av- ava avb ave avi avx ax- axa axe axi axv axx baa bab bae bai bav bax bba bbb bbe bbi bbx be- bea beb bee bei bev bex bi- bia bib bie bii biv bix bva bvb bve bvi bvv bxb bxi bxx eaa eab eae eai eav eax eba ebb ebe ebi ebv ebx eea eeb eee eev eex eia eib eie eii eiv eix eva evb eve evi evv ex- exa exe exi exx i-v ia- iaa iab iae iai iav iba ibb ibe ibi ibv ibx ie- iea iee iei iev iex iia iib iie iii iix iva ivb ive ivi ivv ivx ixe ixi v-a v-e vaa vab vae vai vav vax vba vbi vbv vea veb vee vei vex vi- via vib vie vii viv vix vva vvb vvi vvv vxa vxv xaa xav xbe xbx xee xev xex xia xie xii xiv xix xvi xxi xxv xxx