a-a a-b aaa aab aag aah aan aay ab- aba abb abg abh abn aby ag- aga agb agg agh agn agy aha ahb ahg ahh ahn ahy an- ana anb ang anh ann any ay- aya ayh ayn baa bab bag bah ban bay bba bbb bbg bbh bbn bby bga bgb bgg bgh bgn bha bhb bhg bhh bna bnb bng bnn by- bya byg byh byn gaa gab gag gah gan gay gba gbg gbh gbn gby gga ggb ggg ggh ggn gha ghb ghg ghh ghn gna gnb gnn gy- gya gyb gyn haa hab hag hah han hay hba hbb hbg hbh hbn hby hga hgb hgg hgh hgn hgy hha hhb hhg hhh hhn hhy hna hnb hng hnh hnn hny hy- hya hyb hyg hyh hyn hyy naa nab nag nah nan nay nba nbb nbg nbn nga ngb ngg ngh ngn nha nhb nhg nhh nhn nhy nna nnb nng nnh nnn nya nyg nyn nyy yaa yab yag yah yan yay ybg yby yga yha yna yng ynn yny yyb yyg yyy