c-- ccc ccd cce ccs ccu ccx cdc cdd cde cds cdu cdx ce- cec ced cee ces ceu cex csc csd cse css csu csx cuc cud cue cus cuu cxc cxs cxx dcc dcd dce dcs dcu dcx ddc ddd dde dds ddu ddx de- dec ded dee des deu dex dsc dsd dse dss dsu dsx duc dud due dus dux dxc dxd dxs dxx ec- ecc ecd ece ecs ecu ecx ed- edc edd ede eds edu edx eec eed eee ees eex es- esc esd ese ess esu esx eu- euc eud eue eus eux ex- exc exd exe exs exu exx scc scd sce scs scu scx sdc sdd sde sds sdu se- sec sed see ses seu sex ss- ssc ssd sse sss ssu ssx suc sud sue sus suu sux sxc sxs sxu ucc ucd uce ucs ucu udc udd ude uds udu udx uec ued uee ues usc usd use uss usu usx uuc uue uus uuu uxc uxu xcd xcx xdc xde xds xed xee xes xeu xex xsc xss xue xus xxx