a-a a-b aaa aab aad aah aan aay ab- aba abb abd abh abn aby ad- ada adb add adh adn ady aha ahb ahd ahh ahn ahy an- ana anb and anh ann any ay- aya ayd ayh ayn baa bab bad bah ban bay bba bbb bbd bbh bbn bby bda bdb bdd bdh bdy bha bhb bhd bhh bna bnb bnd bnn by- bya byd byh byn daa dab dad dah dan day dba dbb dbd dbh dbn dby dda ddb ddd ddh ddn ddy dh- dha dhb dhd dhh dna dnb dnd dnh dnn dny dy- dya dyb dyd dyn dyy haa hab had hah han hay hba hbb hbd hbh hbn hby hda hdb hdd hdh hdn hdy hha hhb hhd hhh hhn hhy hna hnb hnd hnh hnn hny hy- hya hyb hyd hyh hyn hyy naa nab nad nah nan nay nba nbb nbd nbn nda ndb ndd ndh ndn ndy nha nhb nhd nhh nhn nhy nna nnb nnh nnn nya nyd nyn nyy yaa yab yad yah yan yay yby yda ydn ydy yha yna ynd ynn yny yyb yyy