-er -ey c-- ccc cce ccm ccr ce- cec cee cem cer cey cmc cme cmm cmr cmy crc cre crm crr cry cyc cye cym cyr ec- ecc ece ecm ecr eec eee eem eer eey em- emc eme emm emr erc ere erm err ery eyc eye eym eyr m-r mc- mcc mce mcm mcr mec mee mem mer mey mmc mme mmm mmr mrc mre mrm mrr mry my- myc mye mym myr rcc rce rcm rcr re- rec ree rem rer rey rmc rme rmm rmr rrc rrm rrr ry- ryc rye rym ryr ryy ycc yce ycy yec yee yem yer yey ymc yme ymm yrc yre yyc yye yyy