a-a a-b aaa aab aag aam aay ab- aba abb abg abm aby ag- aga agb agg agm agy ama amb amg amm amy ay- aya baa bab bag bam bay bba bbb bbg bbm bby bga bgb bgg bgm bma bmb bmg bmm by- bya byg bym gaa gab gag gam gay gba gbg gbm gby gga ggb ggg ggm gma gmb gmg gmm gmy gy- gya gyb gym maa mab mag mam may mba mbb mbg mbm mga mgb mgm mgy mma mmb mmg mmm my- mya myb myg mym yaa yab yag yam yay ybg ybm yby yga ygm yma ymg ymm yyb yyg yyy