c-- ccc ccd cce ccn ccu ccx cdc cdd cde cdn cdu cdx ce- cec ced cee cen ceu cex cn- cnc cnd cne cnn cnu cnx cuc cud cue cun cuu cxc cxx dcc dcd dce dcn dcu dcx ddc ddd dde ddn ddu ddx de- dec ded dee den deu dex dnc dnd dne dnn duc dud due dun dux dxc dxd dxn dxx ec- ecc ecd ece ecn ecu ecx ed- edc edd ede edn edu edx eec eed eee een eex en- enc end ene enn enu eu- euc eud eue eun eux ex- exc exd exe exu exx ncc ncd nce ncn ncu ncx ndc ndd nde ndn ndu ne- nec ned nee nen neu nex nnc nne nnn nnu nuc nud nue nun nuu nux nxc nxd ucc ucd uce ucn ucu udc udd ude udn udu udx uec ued uee uen un- unc und une unn unu unx uuc uue uun uuu uxc uxu xcd xcx xdc xde xed xee xen xeu xex xnc xnu xue xun xxx