a-a a-b aaa aab aah aan aau aav ab- aba abb abh abn abu abv aha ahb ahh ahn ahu ahv an- ana anb anh ann anu anv au- aua aub auh aun auv av- ava avb avh avn avu b-u baa bab bah ban bau bav bba bbb bbh bbn bbu bha bhb bhh bhu bhv bna bnb bnn bnu bnv bua bub buh bun buu bva bvb bvh bvn bvu bvv haa hab hah han hau hav hba hbb hbh hbn hbu hbv hha hhb hhh hhn hhu hhv hna hnb hnh hnn hnu hnv hua hub huh hun huu huv hv- hva hvb hvn hvv naa nab nah nan nau nav nba nbb nbn nbu nbv nha nhb nhh nhn nhu nhv nna nnb nnh nnn nnu nnv nua nub nuh nun nuu nuv nva nvb nvh nvn nvu nvv ua- uaa uab uah uan uau uav uba ubb ubh ubn ubu ubv uha uhb uhh uhu uhv un- una unb unh unn unu unv uua uun uuu uva uvb uvu uvv v-a vaa vab vah van vau vav vba vbh vbv vh- vha vhb vn- vna vnu vnv vuv vva vvb vvv