a-a a-b a-i aaa aab aai aan aav ab- aba abb abi abn abv ai- aia aib aii ain aiv an- ana anb ani ann anv av- ava avb avi avn baa bab bai ban bav bba bbb bbi bbn bi- bia bib bii bin biv bna bnb bni bnn bnv bva bvb bvi bvn bvv i-v ia- iaa iab iai ian iav iba ibb ibi ibn ibv iia iib iii iin in- ina inb ini inn inv iva ivb ivi ivv n-i naa nab nai nan nav nba nbb nbi nbn nbv nia nib nii nin niv nna nnb nni nnn nnv nva nvb nvi nvn nvv v-a vaa vab vai van vav vba vbi vbv vi- via vib vii vin viv vn- vna vni vnv vva vvb vvi vvv