a-a a-b a-i aaa aab aad aai aam ab- aba abb abd abi abm ad- ada adb add adi adm ai- aia aib aid aii aim ama amb amd ami amm baa bab bad bai bam bba bbb bbd bbi bbm bda bdb bdd bdi bdm bi- bia bib bid bii bim bma bmb bmd bmi bmm daa dab dad dai dam dba dbb dbd dbi dbm dda ddb ddd ddi ddm di- dia dib did dii dim dma dmb dmd dmi dmm i-d ia- iaa iab iad iai iam iba ibb ibd ibi ibm ida idb idd idi idm iia iib iid iii iim im- ima imb imd imi imm maa mab mad mai mam mba mbb mbd mbi mbm mda mdb mdd mdi mdm mi- mia mib mid mii mim mma mmb mmd mmi mmm