a-a a-b a-i aaa aab aad aae aai aam ab- aba abb abd abe abi abm ad- ada adb add ade adi adm aea aeb aed aee aei aem ai- aia aib aid aie aii aim ama amb amd ame ami amm baa bab bad bae bai bam bba bbb bbd bbe bbi bbm bda bdb bdd bde bdi bdm be- bea beb bed bee bei bem bi- bia bib bid bie bii bim bma bmb bmd bme bmi bmm daa dab dad dae dai dam dba dbb dbd dbe dbi dbm dda ddb ddd dde ddi ddm de- dea deb ded dee dei dem di- dia dib did die dii dim dma dmb dmd dme dmi dmm eaa eab ead eae eai eam eba ebb ebd ebe ebi ebm ed- eda edb edd ede edi edm eea eeb eed eee eem eia eib eid eie eii eim em- ema emb emd eme emi emm i-d ia- iaa iab iad iae iai iam iba ibb ibd ibe ibi ibm ida idb idd ide idi idm ie- iea ied iee iei iem iia iib iid iie iii iim im- ima imb imd ime imi imm maa mab mad mae mai mam mba mbb mbd mbe mbi mbm mda mdb mdd mde mdi mdm mea meb med mee mei mem mi- mia mib mid mie mii mim mma mmb mmd mme mmi mmm