a-a a-t a-z aaa aag aao aat aay aaz ag- aga agg ago agt agy agz aoa aog aoo aot at- ata atg ato att atz ay- aya ayo ayt ayz az- aza azg azo azt azy azz gaa gag gao gat gay gaz gga ggg ggo ggt ggz goa gog goo got goy goz gta gtg gto gtt gty gy- gya gyo gza gzo oaa oag oao oat oga ogg ogo ogt ogy oo- ooa oog ooo oot ot- ota otg oto ott otz oya oyo oza ozo ozt ozz taa tag tao tat tay taz tga tgg tgo tgt tgy tgz to- toa tog too tot toy toz tta ttg tto ttt tty tya tyg tyo tyt tza yaa yag yao yat yay yaz yga ygo yog yoo yot yoy yta yto ytt yyg yyt yyy yyz yzy z-g zaa zag zao zat zay zaz zgg zo- zoa zog zoo zot zta zzt zzy zzz