a-a a-c aaa aac aad aae aam ac- aca acc acd ace acm ad- ada adc add ade adm aea aec aed aee aem ama amc amd ame amm c-- caa cac cad cae cam cca ccc ccd cce ccm cda cdc cdd cde cdm ce- cea cec ced cee cem cma cmc cmd cme cmm daa dac dad dae dam dca dcc dcd dce dcm dda ddc ddd dde ddm de- dea dec ded dee dem dma dmc dmd dme dmm eaa eac ead eae eam ec- eca ecc ecd ece ecm ed- eda edc edd ede edm eea eec eed eee eem em- ema emc emd eme emm maa mac mad mae mam mc- mca mcc mcd mce mcm mda mdc mdd mde mdm mea mec med mee mem mma mmc mmd mme mmm