c-- ccc cce ccm ccp cct ce- cec cee cem cep cet cmc cme cmm cmp cmt cpc cpe cpm cpp cpt ctc cte ctm ctp ctt ec- ecc ece ecm ect eec eee eem eep eet em- emc eme emm emp emt ep- epc epe epm epp ept etc ete etm etp ett mc- mcc mce mcm mcp mct mec mee mem mep met mmc mme mmm mmp mmt mpc mpe mpm mpp mpt mtc mte mtm mtp mtt p-p pcc pce pcm pcp pct pec pee pem pep pet pmc pme pmm pmp pmt ppc ppe ppm ppp ppt pt- ptc pte ptm ptp ptt tcc tce tcm tcp tct te- tec tee tem tep tet tmc tme tmm tmp tmt tpc tpe tpm tpp tpt ttc tte ttm ttp ttt