-ey c-- ccc cce ccm ccs ce- cec cee cem ces cey cmc cme cmm cms cmy csc cse csm css csy cyc cye cym cys ec- ecc ece ecm ecs eec eee eem ees eey em- emc eme emm ems es- esc ese esm ess esy eyc eye eym eys mc- mcc mce mcm mcs mec mee mem mes mey mmc mme mmm mms msc mse msm mss msy my- myc mye mym mys scc sce scm scs se- sec see sem ses sey smc sme smm sms smy ss- ssc sse ssm sss sy- syc sye sym sys ycc yce ycs ycy yec yee yem yes yey ymc yme ymm yms ysc yse ysm yss ysy yyc yye yys yyy