a-a a-b aaa aab aad aag aan aau ab- aba abb abd abg abn abu ad- ada adb add adg adn adu ag- aga agb agd agg agn agu an- ana anb and ang ann anu au- aua aub aud aug aun b-u baa bab bad bag ban bau bba bbb bbd bbg bbn bbu bda bdb bdd bdg bdu bga bgb bgd bgg bgn bgu bna bnb bnd bng bnn bnu bua bub bud bug bun buu daa dab dad dag dan dau dba dbb dbd dbg dbn dbu dda ddb ddd ddg ddn ddu dga dgd dgg dgn dgu dna dnb dnd dng dnn dua dub dud dug dun g-d gaa gab gad gag gan gau gba gbd gbg gbn gbu gda gdb gdd gdn gdu gga ggb ggd ggg ggn ggu gna gnb gnd gnn gnu gu- gua gub gud gug gun guu naa nab nad nag nan nau nba nbb nbd nbg nbn nbu nda ndb ndd ndg ndn ndu nga ngb ngd ngg ngn ngu nna nnb nng nnn nnu nua nub nud nug nun nuu ua- uaa uab uad uag uan uau uba ubb ubg ubn ubu uda udb udd udg udn udu uga ugb ugg ugn ugu un- una unb und ung unn unu uua uug uun uuu