c-- ccc cce ccm ccs cct ccu ce- cec cee cem ces cet ceu cmc cme cmm cms cmt cmu csc cse csm css cst csu ctc cte ctm cts ctt ctu cuc cue cum cus cut cuu ec- ecc ece ecm ecs ect ecu eec eee eem ees eet em- emc eme emm ems emt emu es- esc ese esm ess est esu etc ete etm ets ett etu eu- euc eue eus eut mc- mcc mce mcm mcs mct mcu mec mee mem mes met meu mmc mme mmm mms mmt mmu msc mse msm mss mst msu mtc mte mtm mts mtt mtu muc mue mum mus mut muu scc sce scm scs sct scu se- sec see sem ses set seu smc sme smm sms smt smu ss- ssc sse ssm sss sst ssu stc ste stm sts stt stu suc sue sum sus sut suu tcc tce tcm tcs tct tcu te- tec tee tem tes tet teu tmc tme tmm tms tmt tmu tsc tse tsm tss tst tsu ttc tte ttm tts ttt ttu tuc tue tum tus tut tuu ucc uce ucm ucs uct ucu uec uee uem ues uet um- umc ume umm ums umt umu usc use usm uss ust usu utc ute utm uts utt utu uuc uue uum uus uut uuu