-er -ey c-- ccc cce ccn ccr ccs ccx ce- cec cee cen cer ces cex cey cn- cnc cne cnn cnr cns cnx cny crc cre crn crr crs crx cry csc cse csn csr css csx csy cxc cxr cxs cxx cyc cye cyn cyr cys ec- ecc ece ecn ecr ecs ecx eec eee een eer ees eex eey en- enc ene enn enr ens eny erc ere ern err ers ery es- esc ese esn esr ess esx esy ex- exc exe exr exs exx exy eyc eye eyn eyr eys ncc nce ncn ncr ncs ncx ne- nec nee nen ner nes nex ney nnc nne nnn nns nrc nre nrn nrr nrs nrx nry nsc nse nsn nsr nss nsx nsy nxc nyc nye nyn nys nyx nyy rcc rce rcn rcr rcs rcx re- rec ree ren rer res rex rey rnc rnn rnr rns rny rrc rrn rrr rrs rsc rse rsn rsr rss rsx rxr rxs ry- ryc rye ryn ryr rys ryy scc sce scn scr scs scx se- sec see sen ser ses sex sey snc sne snn snr sns sny sr- src sre srn srr srs srx sry ss- ssc sse ssn ssr sss ssx sxc sxn sxs sy- syc sye syn syr sys syx xcr xcx xee xen xer xes xex xnc xns xrc xrx xry xsc xss xxx xxy xyr xyy ycc yce ycs ycy yec yee yen yer yes yex yey yne ynn yns yny yrc yre yrn yrs ysc yse ysr yss ysy yxe yxy yyc yye yys yyy