c-- ccc cce cck ccm ccs cct ce- cec cee cek cem ces cet ckc ckm cks ckt cmc cme cmk cmm cms cmt csc cse csk csm css cst ctc cte ctk ctm cts ctt ec- ecc ece eck ecm ecs ect eec eee eek eem ees eet ekc eke eks ekt em- emc eme emk emm ems emt es- esc ese esk esm ess est etc ete etk etm ets ett k-t kcc kce kck kcm kcs kct ke- kec kee kek kem kes ket kkc kke kkk kkm kks kkt kmc kme kmk kmm kms kmt ksc kse ksk ksm kss kst ktc kte ktk ktm kts ktt mc- mcc mce mck mcm mcs mct mec mee mek mem mes met mkc mke mkk mkm mks mkt mmc mme mmk mmm mms mmt msc mse msk msm mss mst mtc mte mtk mtm mts mtt scc sce sck scm scs sct se- sec see sek sem ses set sk- skc ske skk skm sks skt smc sme smk smm sms smt ss- ssc sse ssk ssm sss sst stc ste stk stm sts stt tcc tce tck tcm tcs tct te- tec tee tek tem tes tet tkc tke tkk tkm tks tkt tmc tme tmk tmm tms tmt tsc tse tsk tsm tss tst ttc tte ttk ttm tts ttt