c-- ccc ccd cce cco ccs ccu cdc cdd cde cdo cds cdu ce- cec ced cee ceo ces ceu co- coc cod coe coo cos cou csc csd cse cso css csu cuc cud cue cuo cus cuu dcc dcd dce dco dcs dcu ddc ddd dde ddo dds ddu de- dec ded dee deo des deu doc dod doe doo dos dou dsc dsd dse dso dss dsu duc dud due duo dus ec- ecc ecd ece eco ecs ecu ed- edc edd ede edo eds edu eec eed eee eeo ees eo- eoc eod eoe eoo eos eou es- esc esd ese eso ess esu eu- euc eud eue eus oc- occ ocd oco ocs ocu odc odd ode odo ods odu oec oed oee oeo oes oo- ooc ood ooo oos os- osc osd ose oso oss osu ou- ouc oud oue ouo ous scc scd sce sco scs scu sdc sdd sde sdo sds sdu se- sec sed see seo ses seu soc sod soe soo sos sou ss- ssc ssd sse sso sss ssu suc sud sue suo sus suu ucc ucd uce uco ucs ucu udc udd ude udo uds udu uec ued uee ues uoc uod uoe uoo uos usc usd use uso uss usu uuc uue uus uuu