a-a a-b a-i aaa aab aai aam aan ab- aba abb abi abm abn ai- aia aib aii aim ain ama amb ami amm amn an- ana anb ani anm ann baa bab bai bam ban bba bbb bbi bbm bbn bi- bia bib bii bim bin bma bmb bmi bmm bmn bna bnb bni bnn ia- iaa iab iai iam ian iba ibb ibi ibm ibn iia iib iii iim iin im- ima imb imi imm imn in- ina inb ini inm inn maa mab mai mam man mba mbb mbi mbm mi- mia mib mii mim min mma mmb mmi mmm mmn mna mnb mni mnm mnn n-i naa nab nai nam nan nba nbb nbi nbm nbn nia nib nii nim nin nma nmb nmi nmm nmn nna nnb nni nnm nnn