a-a a-b a-i aaa aab aai aam aay ab- aba abb abi abm aby ai- aia aib aii aim aiy ama amb ami amm amy ay- aya ayi baa bab bai bam bay bba bbb bbi bbm bby bi- bia bib bii bim biy bma bmb bmi bmm by- bya byi bym ia- iaa iab iai iam iba ibb ibi ibm iby iia iib iii iim im- ima imb imi imm imy iya iym iyy maa mab mai mam may mba mbb mbi mbm mi- mia mib mii mim miy mma mmb mmi mmm my- mya myb mym yaa yab yai yam yay ybi ybm yby yii yim yma ymi ymm yyb yyy