a-a a-c aaa aac aad aam aax ac- aca acc acd acm acx ad- ada adc add adm adx ama amc amd amm amx ax- axa axm axx c-- caa cac cad cam cax cca ccc ccd ccm ccx cda cdc cdd cdm cdx cma cmc cmd cmm cmx cxc cxx daa dac dad dam dax dca dcc dcd dcm dcx dda ddc ddd ddm ddx dma dmc dmd dmm dmx dxc dxd dxx maa mac mad mam max mc- mca mcc mcd mcm mcx mda mdc mdd mdm mdx mma mmc mmd mmm mmx mxa mxc mxd xaa xac xad xam xcd xcx xda xdc xdm xma xmc xmd xmm xmx xxx