a-a a-b a-c aaa aab aac aag aan aau aay ab- aba abb abc abg abn abu aby ac- aca acb acc acg acn acu acy ag- aga agb agc agg agn agu agy an- ana anb anc ang ann anu any au- aua aub auc aug aun ay- aya ayc ayn ayu b-u baa bab bac bag ban bau bay bba bbb bbc bbg bbn bbu bby bca bcb bcc bcg bcn bcu bcy bga bgb bgc bgg bgn bgu bna bnb bnc bng bnn bnu bua bub buc bug bun buu buy by- bya byc byg byn byu c-- caa cab cac cag can cau cay cba cbb cbc cbg cbn cbu cby cca ccb ccc ccg ccn ccu cga cgb cgc cgg cgn cgu cgy cn- cna cnb cnc cng cnn cnu cny cua cub cuc cug cun cuu cuy cya cyb cyc cyg cyn gaa gab gac gag gan gau gay gba gbc gbg gbn gbu gby gca gcb gcc gcg gcn gcu gga ggb ggc ggg ggn ggu gna gnb gnc gnn gnu gu- gua gub guc gug gun guu guy gy- gya gyb gyn naa nab nac nag nan nau nay nba nbb nbc nbg nbn nbu nca ncb ncc ncg ncn ncu nga ngb ngc ngg ngn ngu nna nnb nnc nng nnn nnu nua nub nuc nug nun nuu nuy nya nyc nyg nyn nyu nyy ua- uaa uab uac uag uan uau uay uba ubb ubc ubg ubn ubu uby uca ucb ucc ucg ucn ucu uga ugb ugc ugg ugn ugu un- una unb unc ung unn unu uny uua uuc uug uun uuu uyc uyu yaa yab yac yag yan yau yay ybc ybg yby yca ycc ycu ycy yga ygc yna yng ynn ynu yny yua yug yun yuu yuy yyb yyc yyg yyu yyy