c-- ccc cce cco ccs ccu ce- cec cee ceo ces ceu co- coc coe coo cos cou csc cse cso css csu cuc cue cuo cus cuu ec- ecc ece eco ecs ecu eec eee eeo ees eo- eoc eoe eoo eos eou es- esc ese eso ess esu eu- euc eue eus oc- occ oco ocs ocu oec oee oeo oes oo- ooc ooo oos os- osc ose oso oss osu ou- ouc oue ouo ous scc sce sco scs scu se- sec see seo ses seu soc soe soo sos sou ss- ssc sse sso sss ssu suc sue suo sus suu ucc uce uco ucs ucu uec uee ues uoc uoe uoo uos usc use uso uss usu uuc uue uus uuu