-ic a-a a-c a-i aaa aac aad aae aai aax ac- aca acc acd ace aci acx ad- ada adc add ade adi adx aea aec aed aee aei aex ai- aia aic aid aie aii aix ax- axa axe axi axx c-- caa cac cad cae cai cax cca ccc ccd cce cci ccx cda cdc cdd cde cdi cdx ce- cea cec ced cee cei cex ci- cia cic cid cie cii cix cxc cxi cxx daa dac dad dae dai dax dca dcc dcd dce dci dcx dda ddc ddd dde ddi ddx de- dea dec ded dee dei dex di- dia dic did die dii dix dxc dxd dxi dxx eaa eac ead eae eai eax ec- eca ecc ecd ece eci ecx ed- eda edc edd ede edi edx eea eec eed eee eex eia eic eid eie eii eix ex- exa exc exd exe exi exx i-d ia- iaa iac iad iae iai ica icc icd ice ici ida idc idd ide idi idx ie- iea iec ied iee iei iex iia iic iid iie iii iix ixc ixe ixi xaa xac xad xcd xci xcx xda xdc xde xdi xed xee xex xia xic xie xii xix xxi xxx