a-a a-b a-i aaa aab aai aan aay ab- aba abb abi abn aby ai- aia aib aii ain aiy an- ana anb ani ann any ay- aya ayi ayn baa bab bai ban bay bba bbb bbi bbn bby bi- bia bib bii bin biy bna bnb bni bnn by- bya byi byn ia- iaa iab iai ian iba ibb ibi ibn iby iia iib iii iin in- ina inb ini inn iny iya iyy n-i naa nab nai nan nay nba nbb nbi nbn nia nib nii nin nna nnb nni nnn nya nyn nyy yaa yab yai yan yay ybi yby yii yin yna ynn yny yyb yyy