-er -ey c-- ccc cce cco ccr ccv ce- cec cee ceo cer cev cey co- coc coe coo cor cov coy crc cre cro crr crv cry cvc cve cvo cvr cvv cyc cye cyo cyr ec- ecc ece eco ecr ecv eec eee eeo eer eev eey eo- eoc eoe eoo eor erc ere ero err erv ery evc eve evo evr evv evy eyc eye eyo eyr oc- occ oco ocr ocv oec oee oeo oer oey oo- ooc ooo oor oov or- orc ore oro orr orv ory ov- ovc ove ovo ovv oye oyo rcc rce rco rcr rcv re- rec ree reo rer rev rey roc roe roo ror rov roy rrc rrr rvc rve rvo rvr rvv rvy ry- ryc rye ryo ryr ryy v-e vcc vce vco vcr vcy vec vee veo ver vey voc voe voo vor vov voy vrc vre vrr vry vvc vvo vvr vvv vye ycc yce yco ycv ycy yec yee yeo yer yev yey yoc yoe yoo yor yoy yrc yre yro yve yvo yvr yvy yyc yye yyy