a-a a-b aaa aab aag aak aan aay ab- aba abb abg abk abn aby ag- aga agb agg agk agn agy aka akb akg akk akn an- ana anb ang ank ann any ay- aya ayk ayn baa bab bag bak ban bay bba bbb bbg bbk bbn bby bga bgb bgg bgk bgn bka bkb bkg bkk bkn bna bnb bng bnk bnn by- bya byg byk byn gaa gab gag gak gan gay gba gbg gbk gbn gby gga ggb ggg ggn gka gkb gkn gna gnb gnn gy- gya gyb gyn ka- kaa kab kag kak kan kay kba kbb kbk kbn kga kgb kgy kkb kkk kkn kky kn- kna kng knk knn kya kyn naa nab nag nak nan nay nba nbb nbg nbk nbn nga ngb ngg ngk ngn nka nkk nkn nky nna nnb nng nnk nnn nya nyg nyk nyn nyy yaa yab yag yak yan yay ybg yby yga yka ykk ykn yna yng ynk ynn yny yyb yyg yyy