a-a a-b aaa aab aag aah aar aay ab- aba abb abg abh abr aby ag- aga agb agg agh agr agy aha ahb ahg ahh ahr ahy ar- ara arb arg arh arr ary ay- aya ayh ayr baa bab bag bah bar bay bba bbb bbg bbh bbr bby bga bgb bgg bgh bgr bha bhb bhg bhh bhr bra brb brg brh brr bry by- bya byg byh byr gaa gab gag gah gar gay gba gbg gbh gbr gby gga ggb ggg ggh ggr gha ghb ghg ghh ghr gra grb grg grh grr gry gy- gya gyb gyr haa hab hag hah har hay hba hbb hbg hbh hbr hby hga hgb hgg hgh hgr hgy hha hhb hhg hhh hhr hhy hr- hra hrb hrg hrh hrr hy- hya hyb hyg hyh hyr hyy ra- raa rab rag rah rar ray rba rbb rbg rbh rbr rga rgb rgg rgh rgr rh- rha rhb rhg rhh rhr rra rrb rrg rrh rrr ry- rya ryg ryr ryy yaa yab yag yah yar yay ybg ybr yby yga yha yra yrg yyb yyg yyy