a-a a-b a-z aaa aab aah aau aay aaz ab- aba abb abh abu aby abz aha ahb ahh ahu ahy ahz au- aua aub auh auz ay- aya ayh ayu ayz az- aza azb azu azy azz b-u baa bab bah bau bay baz bba bbb bbh bbu bby bha bhb bhh bhu bua bub buh buu buy buz by- bya byh byu byz bza bzh bzu bzz haa hab hah hau hay haz hba hbb hbh hbu hby hbz hha hhb hhh hhu hhy hhz hua hub huh huu huy huz hy- hya hyb hyh hyy hzy ua- uaa uab uah uau uay uaz uba ubb ubh ubu uby uha uhb uhh uhu uhy uua uuu uyu uza uzb uzh uzu yaa yab yah yau yay yaz yby ybz yha yhu yua yuh yuu yuy yyb yyu yyy yyz yzb yzu yzy zaa zab zah zay zaz zbb zby zha zhu zub zuz zzy zzz