a-a a-b a-z aaa aab aad aah aau aay aaz ab- aba abb abd abh abu aby abz ad- ada adb add adh adu ady adz aha ahb ahd ahh ahu ahy ahz au- aua aub aud auh auz ay- aya ayd ayh ayu ayz az- aza azb azd azu azy azz b-u baa bab bad bah bau bay baz bba bbb bbd bbh bbu bby bda bdb bdd bdh bdu bdy bdz bha bhb bhd bhh bhu bua bub bud buh buu buy buz by- bya byd byh byu byz bza bzd bzh bzu bzz daa dab dad dah dau day daz dba dbb dbd dbh dbu dby dbz dda ddb ddd ddh ddu ddy ddz dh- dha dhb dhd dhh dhu dua dub dud duh duy duz dy- dya dyb dyd dyu dyy dza dzb dzd dzu haa hab had hah hau hay haz hba hbb hbd hbh hbu hby hbz hda hdb hdd hdh hdu hdy hdz hha hhb hhd hhh hhu hhy hhz hua hub hud huh huu huy huz hy- hya hyb hyd hyh hyy hzd hzy ua- uaa uab uad uah uau uay uaz uba ubb ubh ubu uby uda udb udd udu uha uhb uhd uhh uhu uhy uua uuu uyu uza uzb uzh uzu yaa yab yad yah yau yay yaz yby ybz yda ydy yha yhu yua yud yuh yuu yuy yyb yyu yyy yyz yzb yzu yzy zaa zab zad zah zay zaz zbb zby zha zhu zub zud zuz zzy zzz