a-a a-b a-i aaa aab aah aai aay ab- aba abb abh abi aby aha ahb ahh ahi ahy ai- aia aib aih aii aiy ay- aya ayh ayi baa bab bah bai bay bba bbb bbh bbi bby bha bhb bhh bhi bi- bia bib bih bii biy by- bya byh byi h-i haa hab hah hai hay hba hbb hbh hbi hby hha hhb hhh hhi hhy hia hib hih hii hy- hya hyb hyh hyi hyy ia- iaa iab iah iai iba ibb ibh ibi iby iha ihb ihh ihi ihy iia iib iih iii iya iyy yaa yab yah yai yay ybi yby yha yhi yih yii yyb yyy