a-a a-b aaa aab aag aan aau ab- aba abb abg abn abu ag- aga agb agg agn agu an- ana anb ang ann anu au- aua aub aug aun b-u baa bab bag ban bau bba bbb bbg bbn bbu bga bgb bgg bgn bgu bna bnb bng bnn bnu bua bub bug bun buu gaa gab gag gan gau gba gbg gbn gbu gga ggb ggg ggn ggu gna gnb gnn gnu gu- gua gub gug gun guu naa nab nag nan nau nba nbb nbg nbn nbu nga ngb ngg ngn ngu nna nnb nng nnn nnu nua nub nug nun nuu ua- uaa uab uag uan uau uba ubb ubg ubn ubu uga ugb ugg ugn ugu un- una unb ung unn unu uua uug uun uuu