a-a a-b aaa aab aad aag aah aay ab- aba abb abd abg abh aby ad- ada adb add adg adh ady ag- aga agb agd agg agh agy aha ahb ahd ahg ahh ahy ay- aya ayd ayh baa bab bad bag bah bay bba bbb bbd bbg bbh bby bda bdb bdd bdg bdh bdy bga bgb bgd bgg bgh bha bhb bhd bhg bhh by- bya byd byg byh daa dab dad dag dah day dba dbb dbd dbg dbh dby dda ddb ddd ddg ddh ddy dga dgd dgg dgh dh- dha dhb dhd dhh dy- dya dyb dyd dyy g-d gaa gab gad gag gah gay gba gbd gbg gbh gby gda gdb gdd gdh gga ggb ggd ggg ggh gha ghb ghd ghg ghh gy- gya gyb gyd haa hab had hag hah hay hba hbb hbd hbg hbh hby hda hdb hdd hdg hdh hdy hga hgb hgg hgh hgy hha hhb hhd hhg hhh hhy hy- hya hyb hyd hyg hyh hyy yaa yab yad yag yah yay ybg yby yda ydg ydy yga yha yyb yyg yyy