c-- ccc cce cco ccs ccu ccx ce- cec cee ceo ces ceu cex co- coc coe coo cos cou cox csc cse cso css csu csx cuc cue cuo cus cuu cxc cxo cxs cxx ec- ecc ece eco ecs ecu ecx eec eee eeo ees eex eo- eoc eoe eoo eos eou es- esc ese eso ess esu esx eu- euc eue eus eux ex- exc exe exo exs exu exx oc- occ oco ocs ocu ocx oec oee oeo oes oex oo- ooc ooo oos oox os- osc ose oso oss osu osx ou- ouc oue ouo ous ox- oxc oxo oxx scc sce sco scs scu scx se- sec see seo ses seu sex soc soe soo sos sou sox ss- ssc sse sso sss ssu ssx suc sue suo sus suu sux sxc sxs sxu ucc uce uco ucs ucu uec uee ues uoc uoe uoo uos uox usc use uso uss usu usx uuc uue uus uuu uxc uxo uxu xcx xee xes xeu xex xoc xoo xos xox xsc xss xue xus xxo xxx