a-a a-b a-i a-z aaa aab aai aav aaz ab- aba abb abi abv abz ai- aia aib aii aiv aiz av- ava avb avi avz az- aza azb azi azz baa bab bai bav baz bba bbb bbi bi- bia bib bii biv biz bva bvb bvi bvv bza bzz i-v ia- iaa iab iai iav iaz iba ibb ibi ibv ibz iia iib iii iva ivb ivi ivv iza izi izz v-a vaa vab vai vav vaz vba vbi vbv vbz vi- via vib vii viv viz vva vvb vvi vvv vvz zaa zab zai zav zaz zbb zbv zia zib ziv ziz zvi zzz