a-a a-b aaa aab aad aah aan aao aay ab- aba abb abd abh abn abo aby ad- ada adb add adh adn ado ady aha ahb ahd ahh ahn aho ahy an- ana anb and anh ann ano any aoa aob aod aoh aon aoo ay- aya ayd ayh ayn ayo baa bab bad bah ban bao bay bba bbb bbd bbh bbn bbo bby bda bdb bdd bdh bdo bdy bha bhb bhd bhh bho bna bnb bnd bnn bno boa bob bod boh bon boo boy by- bya byd byh byn byo daa dab dad dah dan dao day dba dbb dbd dbh dbn dbo dby dda ddb ddd ddh ddn ddo ddy dh- dha dhb dhd dhh dho dna dnb dnd dnh dnn dno dny doa dob dod doh don doo doy dy- dya dyb dyd dyn dyo dyy haa hab had hah han hao hay hba hbb hbd hbh hbn hbo hby hda hdb hdd hdh hdn hdo hdy hha hhb hhd hhh hhn hho hhy hna hnb hnd hnh hnn hno hny hoa hob hod hoh hon hoo hoy hy- hya hyb hyd hyh hyn hyo hyy naa nab nad nah nan nao nay nba nbb nbd nbn nbo nda ndb ndd ndh ndn ndo ndy nha nhb nhd nhh nhn nhy nna nnb nnh nnn nno no- noa nob nod noh non noo noy nya nyd nyn nyo nyy oaa oab oad oah oan oao ob- oba obb obd obh obn obo oby oda odb odd odh odn odo oha ohd ohh ohn oho on- ona onb ond onh onn ono ony oo- ooa oob ood ooh oon ooo oya oyd oyo yaa yab yad yah yan yao yay yby yda ydn ydo ydy yha yna ynd ynn yny yob yod yon yoo yoy yyb yyy