a-a a-b aaa aab aah aan aau ab- aba abb abh abn abu aha ahb ahh ahn ahu an- ana anb anh ann anu au- aua aub auh aun b-u baa bab bah ban bau bba bbb bbh bbn bbu bha bhb bhh bhu bna bnb bnn bnu bua bub buh bun buu haa hab hah han hau hba hbb hbh hbn hbu hha hhb hhh hhn hhu hna hnb hnh hnn hnu hua hub huh hun huu naa nab nah nan nau nba nbb nbn nbu nha nhb nhh nhn nhu nna nnb nnh nnn nnu nua nub nuh nun nuu ua- uaa uab uah uan uau uba ubb ubh ubn ubu uha uhb uhh uhu un- una unb unh unn unu uua uun uuu