c-- ccc ccd cce ccu ccx cdc cdd cde cdu cdx ce- cec ced cee ceu cex cuc cud cue cuu cxc cxx dcc dcd dce dcu dcx ddc ddd dde ddu ddx de- dec ded dee deu dex duc dud due dux dxc dxd dxx ec- ecc ecd ece ecu ecx ed- edc edd ede edu edx eec eed eee eex eu- euc eud eue eux ex- exc exd exe exu exx ucc ucd uce ucu udc udd ude udu udx uec ued uee uuc uue uuu uxc uxu xcd xcx xdc xde xed xee xeu xex xue xxx