-er -ey c-- ccc cce cco ccr ccs ce- cec cee ceo cer ces cey co- coc coe coo cor cos coy crc cre cro crr crs cry csc cse cso csr css csy cyc cye cyo cyr cys ec- ecc ece eco ecr ecs eec eee eeo eer ees eey eo- eoc eoe eoo eor eos erc ere ero err ers ery es- esc ese eso esr ess esy eyc eye eyo eyr eys oc- occ oco ocr ocs oec oee oeo oer oes oey oo- ooc ooo oor oos or- orc ore oro orr ors ory os- osc ose oso osr oss oye oyo oys rcc rce rco rcr rcs re- rec ree reo rer res rey roc roe roo ror ros roy rrc rrr rrs rsc rse rso rsr rss ry- ryc rye ryo ryr rys ryy scc sce sco scr scs se- sec see seo ser ses sey soc soe soo sor sos soy sr- src sre sro srr srs sry ss- ssc sse sso ssr sss sy- syc sye syr sys ycc yce yco ycs ycy yec yee yeo yer yes yey yoc yoe yoo yor yos yoy yrc yre yro yrs ysc yse yso ysr yss ysy yyc yye yys yyy