a-a a-c aaa aac aad aam aan aax ac- aca acc acd acm acn acx ad- ada adc add adm adn adx ama amc amd amm amn amx an- ana anc and anm ann anx ax- axa axm axn axx c-- caa cac cad cam can cax cca ccc ccd ccm ccn ccx cda cdc cdd cdm cdn cdx cma cmc cmd cmm cmn cmx cn- cna cnc cnd cnm cnn cnx cxc cxx daa dac dad dam dan dax dca dcc dcd dcm dcn dcx dda ddc ddd ddm ddn ddx dma dmc dmd dmm dmn dmx dna dnc dnd dnm dnn dxc dxd dxn dxx maa mac mad mam man max mc- mca mcc mcd mcm mcn mcx mda mdc mdd mdm mdn mdx mma mmc mmd mmm mmn mmx mna mnc mnm mnn mxa mxc mxd mxn naa nac nad nam nan nax nca ncc ncd ncm ncn ncx nda ndc ndd ndm ndn nma nmc nmd nmm nmn nna nnc nnm nnn nxc nxd xaa xac xad xam xan xcd xcx xda xdc xdm xma xmc xmd xmm xmx xna xnc xxx