a-a a-b a-t aaa aab aag aan aat aau aay ab- aba abb abg abn abt abu aby ag- aga agb agg agn agt agu agy an- ana anb ang ann ant anu any at- ata atb atg atn att atu au- aua aub aug aun aut ay- aya ayn ayt ayu b-u baa bab bag ban bat bau bay bba bbb bbg bbn bbt bbu bby bga bgb bgg bgn bgt bgu bna bnb bng bnn bnt bnu bta btb btg btn btt btu bty bua bub bug bun but buu buy by- bya byg byn byt byu gaa gab gag gan gat gau gay gba gbg gbn gbt gbu gby gga ggb ggg ggn ggt ggu gna gnb gnn gnt gnu gta gtb gtg gtn gtt gtu gty gu- gua gub gug gun gut guu guy gy- gya gyb gyn naa nab nag nan nat nau nay nba nbb nbg nbn nbt nbu nga ngb ngg ngn ngt ngu nna nnb nng nnn nnt nnu nta ntb ntg ntn ntt ntu nua nub nug nun nut nuu nuy nya nyg nyn nyt nyu nyy taa tab tag tan tat tau tay tba tbb tbg tbn tbt tbu tga tgb tgg tgn tgt tgu tgy tna tnb tng tnn tnt tta ttb ttg ttn ttt ttu tty tua tub tug tun tut tuu tuy tya tyg tyn tyt ua- uaa uab uag uan uat uau uay uba ubb ubg ubn ubt ubu uby uga ugb ugg ugn ugt ugu un- una unb ung unn unt unu uny uta utb utn utt utu uty uua uug uun uut uuu uyu yaa yab yag yan yat yau yay ybg yby yga yna yng ynn ynu yny yta ytn ytt ytu yua yug yun yut yuu yuy yyb yyg yyt yyu yyy